An Evil Prank Most Foul And Delightful, Muhaha!!!

I was expecting like, "now once you put the cup down, go smash a watermelon in his face" or something drastic

MOM! Is that cup that's on the table yours?

This is a must try.

I tried it.... It was pretty hilarious but then i could spend much time on cleaning that all again ._. .... Damn i would do it again! ^_^

Or you could just put a mound of ice under the cup and hope it melts fast

How to be a dick