I think basketballs shouldn't be in an amusement park at all, that's pretty dumb(on the parks' parts for giving/selling them), but throwing them back and forth?
A girl threw her sweatshirt she was holding while riding the MB Hurricane, right at me. I was in the backseat and she was holding it above her head about half the train up, she turned around, looked, and tossed it, going as far as to give her throw a little follow through. I'm glad I ducked, but the jacket landed on the tracks, which I reported(maintenance said it actually blew off before they could grab it), but she wasn't very apologetic, she didn't even blink, say nothing when I was like"thanks for the shirt, kid". If I've seen anything dumber than that, it made me forget it.