Maybe you know him by his trademark Mohawk. Maybe you've seen him fearlessly go big on the mountain. Maybe you've never even heard of Glen Plake, the man on the cover of a 1988 "Powder" magazine above. But in this Olympic winter season, we wanted to know more about the man some call the father of extreme sports. Naturally, Brian Rooney and producer Alyssa Litoff joined him on the slopes at Mammoth for the the revealing profile embedded below. See you at the bottom.