Sometimes, Andrew Austen gets bored of telling people why he only has one hand. Sometimes, he tells people that God made him that way because, if he had a complete set of extremities, he'd simply be too awesome. Sometimes, he tells people that a shark bit it off. "I have a scar from a hot-glue gun in sixth grade," he says, pointing to a red, quarter-inch long line where his right arm just stops below the elbow. "I was hot-gluing something and it got on my arm and I kept picking the scab so it became a scar. So I say that's a shark tooth.