AlleyAllen said:
During a church outing at a beachhouse in Galveston, I saran-wrapped a toilet seat and the next unfortunate user decided to do a No. 2, not a No. 1.
the saran wrapped toilet--an all time classic.
One of the better ones I remember was from my college frat days---we took one of our buddies about a mile and a half away from the house off campus, took his clothes and left him in his underwear by the side of the road. With ten pennies (a pay phone call cost 10 cents in those days). He made it home no problem--started walking and eventually hitched a ride with someone who brought him back. Still one of my very good friends today a quarter century later.
And for a real trick, go to any fast food drive thru, or hell, any retail establishment anywhere, and offer up payment in an amount to get you a round amount (no pennies) back in change---after they've already rung the straight dollar amount into the register. For example, say it's 3.69 for your happy meal, give them $4.04 or $4.09. Watch the steam come out of their ears and the chipmunks turn their brain as they try to decipher what change you're actually due. Oh the hilarity!
(Warning, though--always be careful what you get back--they're as likely to shortchange you as either get it right or over pay you).