How would YOU end the world?

[Amake]

I'd like to end the world as we know it by erasing the concept of walls.

What do you think happens when no one can keep anyone or anything out?

[Satan's Onion]

I'd make the principal cast of the Ghostbusters films cross the streams...for real.

[Mirai Gen]

Really Pinky and the Brain's giant magnet on a cable idea is the best one of all time.

"...and then everyone will fly off the face of the earth!"

[The Artist Formerly Known as Hawk]

Hellgate.

Nothing more fun than opening up a doorway to a realm of infinite demonic entities in another universe and allowing them to ravage the earth.

Either that or nanites. Order them to replicate, using any and all resources. Eventually the whole planet becomes Grey Goo, then the moon, then all the other planets, eventually it works its way up galactic threat level.

If not either of those then I'd find some way of breaking apart the strong nuclear force with a blast of energy, make it self sustaining so that once it's set off it continues on through space never ending, then set of a Reality Bomb ala Davros and destroy the entire universe.

[Geminex]

Originally Posted by Satan's Onion

I'd make the principal cast of the Ghostbusters films cross the streams...for real.

Really, am I the only one to whom "crossing steams" sounds homoerotic?

[Pip Boy]

Sounds like trying to pee on each other.

Kinky.

[Meister]

Originally Posted by B_real_shadows

by forcing everyone over the age of 18 and before menopause (and the male equivalent age) to have continuous sex until impregnated

You know, when you decided your plan would involve turning Earth into a planet-sized rape camp, you probably stepped out of any sphere of ethics where you'd still need to observe the age of consent.

Okay I get that someone needs to work but a little prepubescent child labour goes a long way.

[Si Civa]

I for one will just wait until Kurt Vonnegut's Galápagos comes true.

You can made it happen brainiacs.

[krogothwolf]

Large Global Scaled Mecha Combat. And just for fun, arm them all with Rail gun's that fire nukes!

[Hanuman]

Hard question, I'd probably say that the best ending ever would probably be if the world suddenly got the same physics as Valhalla and every second hour (every first would be feasting) we play musical chairs, but instead of sitting down we'd have killing that feels like getting hit with 20lbs of awesome fun, and each city has one loser every hour that just doesn't get revived, everyone else pops back up, feasts, then we go back out and do it again and again until only two survive.

THEN

Everyone else raises back up and we have the most awesome tournament ever, then we have nationals and world wide, then we all fly to mars and blow up earth. Screw earth.