A guy who comes into my library lost a leg. ("It was under the bed," he jokes.) Meaning that he uses a prosthetic one. Actually, he owns two. (At $57K each. Yikes!)
He's currently training for a tri. Haven't yet found a time when we can ride together.
My mind flashed to him last week when that car hit me and I watched the bumper impact my left leg. "Mine'll be cheaper than Geoff's" is what passed through there before I tucked-and-rolled.