couple of teeth knocked out, i understand. >> the chopper has not fared as well. >> the helicopter was totaled, completely totaled. unusable. >> within an hour, a rueful dennis is not just walking and talking, he's giving the news conference he had always hoped to avoid. dennis, the safety evaluator, has to assess his own performance and realizes where he'd gone wrong. he had forgotten one adjustment to his program and had fallen victim to the high density altitude at the airfield that day. >> as soon as i started the maneuver, i thought this helicopter is performing fairly normally so i ran in at the normal height, at the normal speed. >> he was too low and too slow for this place and time. >> there wasn't sufficient air space to recover. at that density. on a cold day in england, it would have been more than add