"I've been knocked out twice. The first time I was really young, and I was skating with a shirt that was too long. When I fell on my knees, my shirt went over my knee pads and it just threw me forward onto my head."

Paul Zitzer’s comment: I usually wouldn't condone skating without a shirt, but if it gets to the point where you're getting knocked out because of your shirt, I say take the thing off already.