...thing you had done to you as a child by someone else? What's the worst thing you did to someone else as a child? Me, I had my hair tied in really tight knots by the kid who lived across the alley from me. Worst thing I ever did was teaching my brother to ride his skateboard.. He couldn't stay on it, so I super glued his feet to it, and pushed him down the hill of our school playground straight into a metal fence. That's 1 of three times he needed stitches somewhere in his head because of me.