Smoke someone up with a blunt, dont hit it. tell 'em it's got pcp in it, and force them to take it to the face. When they finish, tell them april fools
Or, smoke someone up, and put some ridiculous horrible psychedelic in it like DOC or 5-MeO-AMT. They'll hate you forever.
lol want prank ideas go to break.com SHitload of prank vids on there If ya cant find a good one the old excercise ball to the face should do the trick