Everyone has one thing they’re really good at. Maybe you have the best-kept garden in your neighborhood, or maybe no one can beat you in League of Legends. If you’re Christopher Ullman, you can rest assured that no one is a better whistler. Christopher is a four-time world champion whistler, and he takes his craft very seriously. For him, whistling is an art and like any art, it takes a long time to master. Watch as he performs his talent and changes what you thought was possible from whistling.