Haha, I have an incredibly similar story except I knocked the shit out of a relatively unimposing 15 year old.

I was doing this pulling thing, just like your brother and I kept on running this guy over, I was a senior, he was a sophomore and not much of an athlete and so we kept on having to do it over and over again cause the coach was getting mad at him so one time I kind of let up and my coach threatened to make me run for it so the next time I knocked the bejeezus out of him, I even blacked out a little.

I would have felt bad but I really don't like running.