the first thing i thought was people would have hit the windshield. >> film maker jeremiah whitlock is behind the camera inside the chopper as it goes down. >> i felt that slight sinking feeling in our stomach as you go over top of the hill fast in your car. or the top of a roller coaster. >> after following the racers from a distance from the start of the course, whitlock wants to get in closer before the last series of turns before the finish line. >> the helicopter was moving to cover them better. >> he is focused on the racers below, not the position of the helicopter. >> that's when the helicopter started to lose power. we started dropping quick. that's when the rotors starting clipping the top of the tree. i didn't really have time to think. i just held on to my camera until we hit. >> the impact is surprisingly