Clint tiptoed down the hallway, a bucket in his hand. Tony followed, a rope clutched in his left hand and a roll of duct tap on his wrist. Tony was creeping along the wall, and Clint wasn't sure why. Clint stopped for a moment, adjusted his heavy backpack and continued.

"Da da daaa, Da da daa, DA DA!" Tony hissed under his breath.

"Shit, Tony, stop stomping!" Clint snapped, turning to shoot a look at Tony.

"I'm not making a sound!" Tony yell-whispered back.

"You sound like an angry elephant!" Clint growled.

"I know I've put on a few pounds but that's very rude!" He wailed.

"He's right." A voice said coolly behind them, causing them both to jump. "You shouldn't laugh at a girls weight. Human females are very delicate, I've heard."

They both turned and, trying to hide the things in their hands, faced Loki.

"You've heard, because you will never experience, what a human female is like." Tony grumbled.

Loki narrowed his eyes and walked slowly toward them. They smiled, guilt written all over their faces. Loki peered at their poorly hidden supplies, and instantly Tony and Clint scooted closer together to fully block what they where holding behind there backs. Loki chuckled and shook his head, walking pushing past them and walking to his bedroom. They listened as the door clicked shut behind him, and Clint smacked Tony's shoulder, frowning.

"Ow!" Tony whimpered.

"I told you to stop stomping, this dude has, like, vulcan hearing or something!" Clint muttered angrily.

"He's in his room now, we can still pull it off!" Tony hissed.

"Okay, but we have to be super, super, SUPER quiet." Clint agreed at last.

They crept the rest of the way down the hall, before stopping at an air vent. Clint pulled out a crudely designed map, and attempted to smooth it out on the wall.

"Loki's room is the second room on the right." he murmured, deep in thought as he smoothed out the crinkled edges on the map.

"So this is the right air vent." Tony piped up.

"Are you sure?" Clint asked doubtfully.

"I designed this building, don't forget." he scoffed.

"And you remember were each air duct leads?" Clint asked with a sarcastic sneer.

"Of course." Tony replied sincerely with a 'duh' look on his face.

They stared at each other for a moment longer before Clint broke off the contest and reached out, gently popping the screen off the wall. He flinched as the soft metallic noise echoed down the hall. Clint dropped it onto the soft carpet with a soft thump, and crawled effortlessly inside the vent. He turned and looked expectantly at Tony.

"I don't think I'll be able to climb in there so easily." Tony gaped.

"Use the bucket if you have to!" Clint hissed.

Placing the bucket upside-down he used it as a step. Pushing off, he flopped halfway into the vent with a loud clang, and with a yelp, started to slide back. Clint lunged out and grabbed Tony's arms, straining to pull him into the vent. Puffing, Tony's legs flailed in mid air and Clint gave one final tug, and Tony slid into the air vent.

"That was exhausting! Tell you what, you go do the dirty deeds and I'll wait here." Tony said after catching his breath. Clint frowned. That was enough to silence Tony who grumbled.

"You're not seriously afraid of air vents, are you?" Clint asked as he took the lead.

"Exmortis, Grave Encounters, The Grudge. I have learned my lesson with air vents, man. Nothing good ever comes from crawling around in one."

Clint chuckled an for the rest of the way they moved in silence, passing up the first vent. As they carefully passed over it, Clint stopped.

"Tony!" he hissed.

"Yeah?" Tony called up.

"I think this is Loki's room!" Clint whispered, leaning down to peer through the vent.

"I can assure you, its not!" Tony called up. He leaned his weight back and forth on his hands and knees, anxious to get out of here. This vent was giving him the creeps.

"Are you sure? It has a green comforter on the bed!" he called back.

"So?" Tony asked irritably.

"Isn't green Loki's color?"

"Green is also the Hulk's color. What's your point?"

Clint stopped for a moment and nodded. "Alright." he moved forward and in the darkness a dull groan of metal sounded from ahead of them.

"What the hell was that?!" Tony gasped from behind Clint, his eyes wide with fear.

"Shhh!" Clint shushed him and peered into the darkness. Again the groan came, sounding metallic. It sounded like something was making its way toward them in the air vent. Then, a blast of cold air rushed through, and the sides of the vent groaned as the cold air blasted through them. Tony and Clint both clapped their hands over their ears as the deafening sound of contorting metal rose up around them. Tony, unconsciously scooted back…right onto the screen over the first room. Tony felt the screen shutter and before he even knew what was happening the screen broke. Tony reach out and gabbed Clint's arm, dragging Clint with him. They fell and landed on something wooden, and with a splintering noise it broken the vials and test tubes that hadn't been crushed by the clumsy duo shattering, the contents splashing into the walls, carpet, and them. Clint had landed to the left of Tony and they both made high pitched wheezing noises, the air beat out of them.

"I suggest you guys run." The voice behind them murmured. Rolling onto their stomachs they saw Dr. Banner sitting on his bed. A bed with a green comforter. He seemed to be attempting his breathing exercises, but his fists clenched and unclenched.

"Yo Banner. How's it going?" Tony started, some foul smelling green liquid sliding out of his hair into the floor.

"Years of research… has been destroyed by you.. You imbeciles!" he managed to force out, his eyes glowing a dangerous shade of green. Clint was now on his feet, blue liquid all over him. He nudged Tony with the toe of his shoe and Tony struggled to his feet.

"Now, Banner-" Clint started in a soothing tone. He was cut off.

"RUN." Banner roared, his voice no longer sounding human. His back arched as the painful transformation began.

"SHIIIIIIT!" Tony yelled as he ran out the door. Clint wasn't far behind him. They had just made it to the elevator when two words rang though the whole tower.

"HULK SMASH!"

Cliff hanger again! Please tell me that some of you guys got the air vent references? Well, review and let me know if you liked the chapter.