In 10th grade a really little kid was throwing opened ketchup packets at my shows and saying obnoxious things like "Score!" and what not when he got some ketchup on my shows. He was sitting down completely defenseless, kind of stupid for a little kid to do in the first place, so I just took my burrito and slammed it in his face and then smeared it all over him, then he started crying and threw a piece of the burrito at me and ran away. Not really a prank but kind of funny.