|Biff, your described what probably is a nightmare to most of us: Hurting someone else when skating. Reminds me of a close encounter I has years ago while skating the vert ramp in Sattel, Switzerland. After I dropped into the ramp a kid (maybe 11 years old) ran into the ramp and I luckily missed him by a hair. I was in deep shock but I immediately ran after him and scolded him to pay more attention in the future. If I had crashed into him I would have hardly noticed but I would have pulverized him. Those are the laws of physics.