I need a CRAZY april fools joke!?

Okay so tonight, sometime around 4, or 5, I'm going to my friends house with my 3 best friends. So there's gonna be 4 of us. But 2 of them are gonna play a prank on me, so me and the other girl reallllyyy wanna get them back bad. We need something SO crazy. none of the stupid ones of hear of so far, like the toilet one, or whatever. but it has to be doable, as we are only 15. We're gonna videotape it for facebook too! thanks guys ( :