When I was younger my parents used to send me to a camp in GA called "Short Mountain". It was some kind of christian camp...
Anyway, we would go horseback riding like everyday. Well there was this guy who was afraid of his horse, so was going REALLY slow in front of me and constantly stopping. We kept getting farther and farther away from our group. I got angry at this guy, so I snapped a switch off of a tree and whacked the horses behind. The horse freaked out and took off through the woods!! The boy started screaming and crying as the horse smashed through bushes and try to brush him off by hitting trees and stuff. The couselor came hauling rear to see what had happened. Eventually they got the horse to stop, and the boy walked back to camp crying. I was all innocent: "I have no idea what happened Mr. Jarell, the horse just wigged out"
It sounds mean now, but it WAS funny when it happened.