Disclaimer: I do not own Katekyo Hitman Reborn.

Note: This happens in the TYL Arc.

Six Ways the World Could End

Song: "End of the World" by Ayumi Hamasaki

Characters: Vongola Decimo, Guardians (See, it's still 2 characters! Well… there are others…)

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Method 1: Via Hibari Kyoya

"Kyoya, I know you don't like listening to authority, but I'm sure that you knew better than this! Dino yelled as the two ran at top speed away from the propagating mass of spikes behind them. "How much Flame did you put into the Vongola Box?"

Hibari smirked. "Enough."

The two jumped into a ditch "conveniently" placed there for them, just in time to escape the expanding hedgehog. They looked up as the purple spiked surface covered the opening of the ditch, sealing them off from the world outside. Sounds of smashing rocks and trees echoed from the forest Dino had chosen for them to train in.

"So…" Dino began nervously. "How long is he supposed to propagate?"

"Long enough to destroy Millefiore," the other answered, yawning and stretching out on the dirt floor to take a nap.

"Kyoya, that's on the other side of the world…"

Hibari stared at him for a second before shrugging and turning around to sleep. "At least there won't be any more crowds after my hedgehog's finished."

Death by indifference.

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Method 2: Via Sasagawa Ryohei

"So this is the new weapon I've developed for Vongola," Giannini announced proudly as Tsuna and the others stared with awe at the massive machine.

"What does it do?" the Tenth Vongola Boss asked, a little nervous about the answer. He admitted that the inventor had greatly improved these past ten years, but once in a while, he would create something completely unnecessary and sometimes downright dangerous. This was one of those times.

"It's a weapon," Giannini replied, "capable of destroying the world in the blink of an eye. I've managed to combine technology with nuclear physics and…" Tsuna zoned out to the rest of the technical lecture of the great and awesome machine before him. Another problem bothered him now. Thankfully, Gokudera spoke the mafia boss's mind for him; after all, what are right hand men good for but to help destroy another subordinate's happiness with reality?

"What the hell do we need a world destroying bomb for?" Gokudera burst out.

"Against our enemies of course," Giannini answered innocently, completely unaware of the direness of the situation if the weapon were to explode.

"And what would that do if we kill ourselves along too?" the Storm Guardian continued, annoyed.

Giannini contemplated this for a moment. "I suppose you're right. I'll start disassembling it tonight after the meeting. So…" He pointed at a shiny red button next to the machine. For some reason, important buttons that could mean the destruction of the world always had to be large, shiny, and red so that anyone with less than half a brain would eventually press it out of curiosity. "Just make sure not to press that button before then. It's the activation device."

Tsuna sighed. "Please remember, everyone."

"I'll remember to the extreme!" Ryohei declared; Tsuna almost swore that fire lit up in his Sun Guardian's eyes.

That fire didn't help.

"Thanks for offering to help me," Giannini said to Ryohei when they entered the room after the meeting. "It's a tricky business, but there are some areas where we just need brute force to pull the parts off… Wait, what are you…"

"We can just get rid of it by blowing it up to the extreme!" Ryohei yelled passionately as he hit the button of doom.

Thus, the Earth went up in flames not because our dear Sun Guardian forgot that the "red button" would cause the bomb to explode but because he forgot the explosion would wipe out the world.

Death by forgetfulness.

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Method 3: Via Rokudo Mukuro

Tsuna had always known that his Mist Guardian held a very special place in his heart for the mafia, so when it eventually happened, it didn't surprise the tenth boss of Vongola much. Rather, the only thing that shocked him was the method Rokudo Mukuro had finally decided to use in order to eradicate the mafia.

He decided that his dear Mist Guardian had finally snapped from the pressure; after all, Tsuna was pretty sure that Mukuro had screwed up and afflicted everyone else in the world with the illusion, instead of just the mafia. How did he know? He had seen at least three people accidentally walked into the road when the walk signal was red during his short trip to the grocery. They didn't meet pleasant ends. Another five had crashed into various lampposts and stop signs for no apparent reason.

At the moment, a man ran down the street screaming for someone to take the visions out of his mind, tossing himself over the bridge into the river below.

Tsuna frowned. Looking at pineapples floating in every corner of one's vision would make any human being crazy eventually, if they didn't die from crashing into poles they didn't see first.

Death by insanity.

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Method 4: Via Gokudera Hayato

"Die!" the Storm Guardian yelled as he tossed his dynamite at the enemy, infusing the sticks with Storm Flames. He miscalculated again as the bombs went everywhere and blew up a good chunk of the building along with the intended targets.

"Gokudera…" Tsuna began, frowning.

"Ah, sorry, it's just that I haven't used dynamite in so long, that I'm a little rusty," the other replied, blushing as he scratched his head.

"No… we're in a nuclear power plant. We're in the future, remember? So… energy in this age should be…"

"Boom!" Reborn said through their headsets.

"Don't worry, if something was going to blow up, we'd be dead already," Gokudera said confidently.

"Hey look! That stick's fuse is still lit!" Yamamoto said as he looked over the edge at one of the dynamite.

"I forgot about those…"

Death by lack of practice.

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Method 5: Via Yamamoto Takeshi

"Shigure Souen Style, twentieth form…"

"Rain brat, an attack that drowns both your enemy and yourself is not…" Superbia Squalo yelled as the two climbed a tree in an attempt to reach higher ground.

"I can't really hear you!" Yamamoto yelled back through the downpour he had created with his latest addition to his Shigure Souen Style.

"How long is this damn rain supposed to last?"

"Huh?"

"Voi! I said, 'How long is this damn rain supposed to last?'" Squalo yelled again, angry.

"Huh? I still have to work on it?" Yamamoto replied, confused. 'Might as well add more Flame to it then…' he thought as he fired up his Vongola Rain Ring.

"No!" The other swordsmen stared with horror half a second too late when he finally realized what his student was doing.

The water beneath them began rising as the sky threw rain like waterfalls at them and the ground became a gushing river.

Back at the base, Tsuna and the others looked up as the roof started leaking…

In Italy, one of the subordinates burst into Byakuran's room, a look of horror in his eyes. "Byakuran-san! We're getting a flood!"

Yamamoto Takeshi must have had a lot of Rain Flames…

Death by miscommunication.

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Method 6: Via Lambo (a continuation of Method 5 that makes it more concrete to ensure our worldly destruction)

"Yay!" Lambo said happily as the little droplets of water began turning into streams.

"Are we being flooded?" Giannini said, panicking. The water blew a hole in the room and began gushing in, threatening to cut off their air supply.

"Waterpark!" the young Thunder Guardian declared triumphantly as he floated around on one of the plates that had fallen out of the cupboard.

"Ah! We have to get out of here!" Tsuna yelled to the others before turning to Lambo to grab the 5-year old. "No Lambo! Don't…"

The cow-suited kid inserted his Thunder Flames into his Vongola Box.

Death by stupidity.

Note: One more week before the end of my second semester! Thanks for reading!