is one of them. >> my name is tyler bradt.e here in missoula, montana, and i'm a professional kayaker. >> he's traveled the globe traveling after rapid after churning rapid. >> what i've fallen in love with is the extreme side of kayaking. basically running difficult rivers, hard rapids, big drops, and waterfalls. >> tyler paddled over his first waterfall at the age of 15, and has never looked back. >> i would say as an extreme kayaker, i've probably run 100, 150-plus waterfalls. i've kind of lost count over the years. >> in september 2007, tyler came across alexandra falls in canada's northwest territories, it was far higher than any waterfall he had ever done before, 107 feet tall. and he decided to go for it. >> the feeling behind running that waterfall was a moment in time that i will remember forever. i surfaced upright without even flipping over off that waterfall. it was amazing. >> the ride over alexandra falls didn't just give tyler a major adrenaline rush, he also gained the world record for the highest waterfall any