>>50802
Well I sort of do my stories myself, but your characters and their crazy attitude would probably fit this short simple idea for a prank :)

One of the girls come to the boys and tells then that she lost a toy in her ass (or boys could be dressed as police and doing cavity search )

They stuff a hand into her butt and pull out a grenade which has no pin so it is about to blow up.

Being very surprised not sure who to deal with it they stuff it back and the lower half of the girl explodes splattering everything with blood and guts leaving just her upper half and 2 severed legs

For more fun the hand of the boy who is stuffing it back could explode as well before he pulls it out.
If she is still alive she may suck someones dick.

So that was my idea, but whatever you chose to do will be fine.