at an air show in utah in june of 2008, and one person eager to see it, and videotape it, is tina tyler, an american gyrocopter pilot. i packed up my gyro and headed to utah with my camera in hand. for dennis, there s a setback at the beginning of the event. the helicopter is unfamiliar and it s heavier than he s used to. i normally fly with ten gallons on board, which weighs 80 pounds, 72, in fact, and i had 30 on board, three times the weight. as dennis takes off, he s aware of another element that will have a major impact on his performance. the air park had two things going for it. it was high and it was hot, 96 degrees that day. both those factors spelled danger for a pilot. in utah, it s about 5,000 feet elevation and it was a warm day that day. this creates a condition called high density altitude,
friend videotapes the achievement. then something goes horribly wrong. in a utah canyon a man rapels down a towering cliff, but loses control and falls 100 feet to the bottom. i thought for sure that my life was coming to an end. hey, you okay? in the summer of 2009, eric shrever and david cardona are hiking through utah s zion national park. they re both experienced canyoneers, skilled at getting through canyons by any means possible. that includes climbing, rapeling or even swimming. i ve always loved the outdoors. i ve been an avid hiker. but this canyoneering sport, it takes hiking to a whole new level, and i started dabbling in that about three years ago. i ve been doing canyoneering for about a year with eric. this time, david is also