Does your bike fit? Why don't you mess around with it until you find a position of doing it where it doesn't hurt. I never saw anyone say this on this forum. Do we have any skid and Doctor professionals around to give this guy a physical and check his shoulder out? You should try stretching before you ride, maybe you pulled something? I don't see how skidding and holding a little of your body weight would hurt your shoulder. You never had anyone shoulder pain before trying it?