I don't own Adventure Time!

I so wish I did though. Anyway, HOLA CONSUELOs/CONSUELAs! I am so happy for this chapter, because you get to see Brad get some just desserts! I wonder why it's said that way, 'cause aren't desserts supposed to be nice? If you want to get revenge on someone, you should give them something gross or nasty but not dessert! That'd make them happy. Haha, I AM BEING RANDOM. Back to story. Yep, I'm pretty sure you'll like it. So you should start reading.

A WONDERFUL, CRAZY, 'GOODNESS GRACIOUS, IT'S SO ENORMOUS' thank you to I am Red Bull, for co-writing this chapter with me! For those of you who haven't read his story yet, his writing style is showcased in the beginning of this chapter. And once you read it, I'm sure you'll love it so here's his story again, its called Be My Beginning and can be found on my favorites list or on the list of Doctor Who and Adventure Time crossovers.

Anyway here is Chapter 12.

Finn arrived at Kieran's room spot on 5:30am dressed in his running clothes as requested. 'Knock, knock' he tapped on the door. Finn immediately heard some rummaging and clattering around and after a moment Kieran opened the door. Finn's jaw gaped at the sight of Kieran's usually tidy room. Tools and bits and pieces of... well, improvised 'things'' lay scattered around the room in a jumbled mess. Center it all lay what appeared a long pipe with a larger chamber at its end, although not exactly Finn's area of expertise his best guess was it was "A cannon?" Finn spoke surprised.

"Sure is" Kieran responded proudly. Finn turned his attention back to Kieran, he was dressed in gear for running too, only Finn now noticed Kieran's bad bead head and tired eyes. "Someone slept well."

"We're not going to actually 'kill' Brad are we?" Finn asked laughingly "Are we?" Finn repeated, this time more seriously, wondering just what he'd signed up for.

"Oh come on, you said 'I am more than happy to help you'. Come on mate, you can't bail on me now!" Kieran said seriously.

Finn stood shocked not sure if this was some crazy joke or something else. Kieran slapped Finn over the back "Relax, I'm only joking. Whoa I had you going for a moment." Kieran chuckled sitting back down on his bed. "It's a pneumatic cannon, or more commonly known as a 'potato cannon'. I pieced it together with some PVC pipeing, and bike bits." Kieran explained. "See," he pointed to the cannon "Valves from old bike tubes, the left over rubber I used to make the seals and it is pressurized with a bike pump. I had thought of using the rear suspension shock from a mountain bike as the pressurized chamber but figured it probably wouldn't have the volume required. The PVC pipe I already had for protective casing bike parts when traveling. And best of all once broken down into pieces it's just junk and no one would know we had it. Like I said it is just stuff I had lying around." Kieran grinned.

"Well you've really thought this out... but how do I come in? And just what do you plan to do with it?" Finn asked in return. Kieran waved Finn over to the window and pointed toward another dorm block not far away. One thing caught Finn's attention, Brad's room. Finn could clearly see the open window of Brad's room, the definitive give away being the large assortment of football trophies which sat on it's window sill.

"I heard you were a good shot" Kieran spoke, Finn's face lit up.

"With a football at least, but this?" Finn gasped.

"What do you reckon?" Kieran said glancing to the cannon.

"Umm yes I think so, and this is brilliant BUT how wont he know we did it?" Finn questioned, sad to put a kink in Kieran's otherwise fantastic plan.

"Because right now," Kieran said looking to his watch "I am on the cycling squad's morning run AND you decided to join us." But how? Finn was about to ask "Guess who lent them our GPS devices?" Kieran answered subtlety pleased with himself.

"Ohhh" Finn grinned now realizing "That way we can claim we were out running and we have the GPS to back up our stories should anyone ask otherwise."

"We will meet them after completing the prank on the other side of the school at the Velodrome where they will stop to do stretches for ten minutes at ten past six." Kieran explained, once again proving he'd thought this out.

"Okay well we have to first get over their unnoticed to join them, how do you figure on doing that?" Finn asked, it was after all a valid question. How would they?

"That, my friend," Kieran waved his finger "is phase two. But right now, we're running out of time and have to begin. Brad will be waking up soon." Kieran picked up the cannon and handed it to Finn "You trust me don't you? I have figured this out down to the letter. Follow my plan perfectly and there's no way anyone will know it was us."

Finn paused a moment weighing up the decision. On one hand he could get in serious trouble if anyone, especially college security got wind of their prank and Brad would make his life hell if he found out. But Finn also really wanted to teach Brad a lesson, he had it coming... "Okay, I'm in." Finn resolved to say.

"Excellent" Kieran smiled "So I reckon we'll have time for two shots before we have to pull this apart and begin phase two." Finn nodded, whatever phase two may be. "So you aim and press this trigger." Kieran pointed at a small lever on the side "To release the pressure and fire the potato."

Finn proceeded to position himself, leaning on the window sill of Kieran's dorm and pointing the cannon square on Brad's window. Kieran began to raise the pressure with a floor pump to 200psi. Upon reaching that Finn was given the go ahead to fire. He pressed the trigger, the cannon fired perfectly and frustratingly the potato splattered to the wall beside Brad's window. "Again" Kieran said, reloading the cannon with a 'fresh' potato and then pumping up the pressure. The second shot fired, this time not just going through the window but sending trophies flying with it. Like a huge shower of shiny things, they flew across the room, some scattering over Brad's bed and others landing on the floor. A ginormous clatter erupted from the room followed by a "WHAT" and some disgruntled murmurs when then, Brad woke and realized what had happened –this being marked by some heavy swearing. "WHO'S GENIUS IDEA WAS THIS?" among other things could be heard. Finn and Kieran ducked below their window sill out of sight. The two breathed a heavy sigh of relief, then, met one another's gaze with heavy grins "High five!" they said in unison slapping the others hand. Kieran quickly dissembled the cannon, packing away various bits and pieces into his toolboxes. Finn assisted, trying to speed up the process whilst wondering just how long it would be until Brad came knocking on his door looking for someone to accuse. And once Brad realized Finn was out of bed it wouldn't be long until he came looking for him and Kieran, especially after last night.

Kieran led Finn out the door, down the hall and to the downstairs floor into a janitors closet, promptly opening it so both could step inside. Kieran started moving aside some mops and buckets. Finn felt more confused "I thought we were meeting your cycling team for a run?" He questioned.

"We are" Kieran simply stated, pulling open a hatch in the floor to reveal a deep tunnel going down. Kieran took out a light, and simply asked "You coming?"

Finn shook his head and thought "First Jake, now this..."

Kieran climbed in, followed by Finn who closed the hatch behind him. There was a ladder built into the vertical shaft luckily. Reaching the bottom, they stood in an underground passageway which seemed to go on forever in either direction. "What is this place?" Finn spoke in awe, marveling at the underground labyrinth. It appeared to be very old and must have predated the university. It had always been beneath his and everyone's feet and yet he and anyone he knew had known nothing of it. Except for Kieran that is.

"How's your history?" Kieran asked. "Not bad" Finn nodded in response. "There was once a military hospital on this site in the early days of 'the war', and because of that war much of it was built with underground tunnels so that if under attack people could secretly evacuate or move between the various buildings." Kieran begun to explain. "As 'the war' intensified the hospital was expanded and a full scale bomb shelter was built. The tunnels were also strengthened and expanded so to safely lead to the bomb shelter, not just for hospital patients and staff but for local townspeople aswell. But then of course as you would know came the successful armistice and demilitarization of all sides commenced. Quite fortunate for everyone of the world i'd have to say. That war could have been far more terrible. BUT before that, one last tunnel was built. It's an evacuation tunnel into the forest on the outskirts of Ooo university. We today however, will take the earlier exit which opens into the change rooms in the velodrome. No one will question me about being there, I am captain of the cycling team after all" Kieran smiled.

"Incredible" Finn responded as they progressed along down the tunnels, taking turn after turn. Kieran seemed to know the passageways pretty well. "One thing though. How on earth do you know about this place, when no one else does?"

"Hm" Kieran grinned "Bit of a story there. We were building our mountain bike trails in the forest, with permission of course, and we stumbled upon the forest exit I just told you about. Kept it all to ourselves of course. It was just too cool, we started to explore the tunnels. We'd come down here on our mountain bikes with our night lights on and explore for hours. Crazy fun. But anyway no one else really knows about them. Certainly not Brad. These days they're just used as utility tunnels, running cables between the university buildings built above. Most university's have utility tunnels, I don't think there are any others though with anything like this." Kieran finished.

The two arrived at another ladder which led up an upward shaft, like that they had originally come down. And sure enough, at the top they exited into some change rooms Finn did not recognize, mostly because he'd never gone to the velodrome before. The two proceeded to journey outside, on the field near the border of the forest where the cycling team would meet them and they would finish the run. Kieran glanced to his watch "Spot on time" he commented grinning happily. The team were just where Kieran had said they'd be, doing some stretches. They bravoed Finn and Kieran on the prank, many of them having wanted to do such a thing their entire time at the college. Who would've guessed? Finn inwardly chuckled.

Together with the group Finn and Kieran finished the run, now with their GPS devices returned to them. Returning back at the athletics field Finn noticed Brad stomping around and coach trying to calm the situation down. Brad caught sight of Finn and Kieran among the group. "HIM!" He pointed angrily "THEM!" He said again. "The two of them, it must have been. I know it was. They were out of bed when it happened." Brad yelled furiously. The coach called Finn over and Kieran came along to back Finn up.

"Mr Mertens. Brad, here, informs me of a mishap with his football trophies" The coach said as he massaged his temples. He looked very tired and frustrated. Who could blame him though, he's been having to deal with Brad! "He is very sure you and your friend here did it. You were the only one out of bed, which would lead me to suspect you had something to do with this." He said sternly.

"I'm afraid not, Sir" Finn responded, unstrapping his GPS watch. "I was on a run with the cycling team." The coach looked angry.

"Why is that, so you could get up early and pull this prank?" The coach asked.

Kieran quickly stepped into the conversation. "Sir, I invited Finn to join my group's run. I thought it would be helpful to him, since he has been having difficulty training lately thanks to some 'elaborate' pranks by Brad." Kieran glared at Brad. "I figured as a good friend, it was only right I should invite him. I'm sorry if by doing so, conflicted the training schedule you had for Finn." The coach sighed, taking in the truth to his words.

"It is true. I have been informed of Brad's childish pranks directed solely at Mr Mertens." The coach turned to face Brad "And if your shenanigans interfere with his training then I see no reason why he shouldn't seek other means to keep on top of his training. Good initiative, son." The coach turned back and patted Finn on the shoulder. "Still, there is no clear evidence to rule you out of this prank." The coach informed Finn. "And if you were involved their will be consequences."

Finn handed his GPS watch to the coach. "This shows I was on the run the whole time."

Kieran then handed forth his larger device which usually sat on the handlebars of his bike. "And my own GPS shows Finn accompanied myself and a group of 10 others on the run." The coach glanced at the GPS evidence.

"Well Brad, this seems pretty indisputable. Unless you could show me they were sighted elsewhere?" The coach asked. Brad just glared Finn silently. "Well I'd say that clears it." The coach declared.

Finn sighed inwardly in relief. They'd actually pulled it off. Struck a blow against Brad and Brad couldn't even say for sure they'd done it. The group disbanded after that, Finn walked with Kieran laughing over their success where no one else could hear it. Turning back Finn could still see Brad stomping around, shouting paranoid accusations at his various enemies from across the college. He's sure as hell made a few.

"So where are you off to now?" Finn asked Kieran.

"Oh you know, I think I may head back to the velodrome and put in some laps, give my brain some time to sink in what happened." Kieran laughed. "Then maybe I'll cool off in the pool."

"Mind if I come along?" Finn queried. He figured a swim was well deserved.

Unfortunately for the two heroes, assignments of their classes increased ten-fold, maybe exaggerating a bit, but it soon did become too much for them, so they called off pranking until the end of the semester. Soon winter break came, Finn and Kieran spent the holidays with their respective families but when they returned near the end of January, they were ever so anxious to pull more pranks on Brad. Since so much time had passed, they knew Brad was no longer expecting anything so it was high time they start coming up with ideas. They had taken two of the same classes this semester so the two were allowed more time to think when they studied with each other. Luckily, a golden opportunity lied in wait for them. Valentine's day.

"There's no better day for a prank. Everyone is at least a little more vulnerable on Valentine's day." Finn said as he and Kieran made way to his dorm, they had just finished class. Kieran nodded in agreement "Yeah but what could we do? We're handsomely stellar studs, no doubt, but not exactly what Brad's looking for in a valentine..."

Finn replied "But we do know someone who is..."

Kieran eyed Finn suspiciously "Who are you suggesting?"

Finn looked back to Kieran, completely confused by the sudden contempt masked in his voice. Finn soon realized what he said and quickly rephrased "Oh no, no, no. I was talking about Bonnie! Did you think I was talking about Kendra?"

Kieran looked away, remaining silent. "I'm sorry. She's like a sister to me and after that party, I just ... you know what, forget that I asked.

"They walked in silence for a few moments before Finn spoke "For the record, knowing that Kendra is your cousin, I would never do that even if the party incident never' happened. It wouldn't be right."

Kieran smiled gratefully at Finn for understanding "Thank you... well what's this with Bonnie then mate?"

"What I was thinking was we could somehow get Bonnie to send him a little valentine or something like that..." Finn replied.

"I'm pretty sure she would not be willing to do that. See, every Valentine's day, she hands out little cards to show her appreciation to friends. And Brad, I'm sure you can guess, has never gotten one..." Kieran explained

"Well we would just have to convince her, somehow. I'm still finalizing the idea in my head, but I think it will really work." Finn responded.

Kieran shrugged "Okay, so how about we get started, by heading over to Bonnie's right now?"

Finn replied with a high five and they walked over to the girl dormatories.

"YOU WANT ME TO WHAT? YOU CAN'T BE SERIOUS!" Bonnie shrilly screamed. Finn had just explained to her what they needed her to do. He tried to be as gentle as possible introudcing the subject to her, but Bonnie was a bit too sharp for that, forcing him to cut to the chase.

Bonnie continued to shriek "You guys must have inhaled a bit too much chloroform, ether or something in that chem lab you're taking, because you are talking crazy. There is no way, I'm doing that."

"But Bonnie..." Finn said yearningly

Bonnie shook her head "Don't 'But Bonnie' me. Have you not seen what that guy is or does? He's a disgusting, chauvinistic, sexist, unintelligible pigish cad that I want nothing ever to do with! Why would I write him a valentine?"

"We need it, for something." Kieran chimed in.

"For what exactly?" Bonnie asked, still unconvinced. Neither of the men answered. Bonnie thought for a second, something clicked and she said "Could it be for a prank against Brad by chance?" The boys avoided her gaze, still saying not a word. They were both thinking the same thing "The less that is said, the less evidence there is."

After a moment, Bonnie huffed "Since you still chose to answer my questions with silence, I have no substantial reason to fulfill your request..."

"Can't you just do it on the good merit of our friendship?" Kieran inquired.

Bonnie countered "Can't you tell me whatever your plan is on the good merit of our friendship?"

Kieran slouched "Touche."

"Bonnie, please..." Finn stressed. He looked into her eyes, with an unwavering determined look.

Bonnie blushed "Don't look at me like that..." Kieran soon joined Finn, mirroring his expression. Bonnie's face grew to the color of a tomato as she uncomfortably began "I.. I guess..." Finn and Kieran drew closer. "Would you guys let me breath?!" She exclaimed. They snickered as they pulled away from her. Her face soon returned to its normal color and she spoke again "Fine. I guess I'll write a stupid valentine for Brad..."

Finn excitedly high-fived Kieran again as he yelled "Yes!"

"...but my help comes at a price..."

"Anything. You name it, you got it." Kieran replied.

"Hmmm... I'm not really sure of any... Ah! I know, I need a lab." Bonnie answered

Finn and Kieran looked at her confused. "What?" Kieran asked

"Why? Aren't labs in the sicence building?" Finn added.

Bonnie sighed "Yes there is but the presence of labs is not my problem. You see, I am taking Microbiology along with its lab this semester. I would like to experiment a bit further than the scope of the class but my stupid micro lab teacher won't let me. He says my ideas are "too dangerous" and "could leave residual emissions and possibly cause a mass health epidemic". I'm sure he's just trying to scare me. Anyway, he forbid me from using the lab unless we were in lab period. So that's why I need one of my own..."

Finn looked to Kieran, who just shrugged, and then back to Bonnie "We don't really know any place like that..."

Bonnie asked, slightly annoyed "Oh don't you have access to the chem lab?"

"Yeah, but I think there's a reason why the biology labs and chemistry labs are on completely different floors..." Kieran explained

"Hmpf! You guys really don't want this valentine for Brad do you?" Bonnie said as she crossed her arms.

Finn quickly replied as he faceapalmed "Yes we do! It's just... Okay, listen, I think Kieran has a point, so we can't give you the chem lab..."

Bonnie waited, her arms still crossed.

"Jake's going to hate me for this..." He thought before continuing "But I know a secret room in the science building that might be big enough for you to do your extra experiments."

Bonnie smiled excitedly as she clapped her hands "That's awesome! Thank you so much! Now, question. What do you guys want me to write on this valentine? I don't really like Brad too much, as you very well know, so I don't know what to say..."

Finn grinned and explained. After that, Finn and Kieran left, back on the way to their dorms.

"So why exactly did you want Bonnie to write that valentine for Brad? We could have done it ourselves!" Kieran asked

"It had to be authentic. We could have but Brad is such a stalker of hers, he probably would have recognized if it were her handwriting or not. Plus, if you haven't noticed already, Bonnie has a certain scent about her. I'm sure it would be left on the valentine, further ensuring it's authenticity." Finn clarified. Kieran nodded "Okay, that makes sense. Well now what do we do?"

Finn smirked "We get the word out..."

A/N:

So hey! What did you think?

What do you think Finn's idea is? Why does he want to get the word out about Bonnie's valentine?

TELL ME IN REVIEWS PLEASE!

Really guys, I like to 'hear' what you think and what you liked or didn't like about the chapter. It makes my day.

You guys are awesome. ;)

Always know that I think that,

Spazzaye

AND ANOTHER SUPER BIG HUMONGO THANK YOU to my co-writer for this chapter, Mr. I AM RED BULL.

He's so nice he gets thanked twice!