going right down his lane and that david's car actually darted across the track and kind of hit tommy adamsright in the quarter panel which sent tommy's car right. we knew that was bad. >> in the business of drag racing, everything could change in a fraction of a second. when david's car steers into tommy's, traveling at 150 miles per hour, that's all it takes for things to go seriously wrong. >> tommy was crossing the guardrails when it went right and off the track and into the grass, there was a small hump right there when you went off the track and he hit it, he hit it just right. the car just started barrel rolling. it went up in there and just started flipping. it looked like it was going faster there than it was actually on the race track. kind of a strange thing to see a 3,000-pound car flipping. it wasn't supposed to be that way. it didn't look right. >> a drag racer since he was 14 years old, galen is no stranger to crashes. he's even had a scary one himself in 2010, also caught on camera. so, he knows what tommy's going through. >> losing control of the car as a driver kind of giv