I ran in front of the car of an old man once on my way to Burger King with a few friends. Jumped out of the way just as he hit the breaks and ran like hell. Later, my friends and I got some of those Circle K icees and added a lot of crap into it (IE: Pickles, Doritoes, ketchup, and some other stuff), then we played basketball. Needless to the game never got finished as we spent most of the time hurling in the bathroom.
This other time we scaled the school next door to me during the weekend and put a boom box up there played some Slayer full blast and left. The CD was on Repeat ALL so the same songs kept playing over and over for hours. It was pretty loud too. I could hear it a couple of blocks away. I never did get that CD back though.
Lastly, I got chased by a cow. I don't know what the hell a cow was doing in my friend's backyard, in the city, but yeah. The cow decided to charge me for no apparent reason while my friends were laughing their asses off as I ran for my life, with a sprained wrist. Ooh, yeah, I had backflipped off of his trampoline and sprained it earlier that day. Anyways, I finally lost it, but I think I'm mentally scared for life.