The Teton Juggler gets his name from his famous videos showing him juggling while skiing. He's a "flow artist" who does impressive tricks while on the powder, including throwing a pin around a tree while he skis next to it (0:07) and balancing a pin on another while in motion (0:25).
But he can do a lot more than just ski and juggle! The Teton Juggler also has videos showing juggling on a tightrope, mountain biking, mountain unicycling, and riding a horse. My favorite performance is when he does a back flip while skiing and doesn't miss a single pin.
-via Massimo