the pilot is 70-year-old leslie gropp. the co-pilot is nathan williams. the passengers are leslie's son and alexander garrett. they start gaining some elevation, then the nightmare happens. >> they're getting too close to the trees. >> oh, no! no, no, no. >> oh, no. >> the video goes to black. >> is everybody okay? >> you can hear people writhing in pain. you hear them trying to get out of the plane. according to their youtube video, they said that after takeoff they had a hard time gaining altitude, maybe because of the warm weather. they believe they hit an air pocket and that made them lose altitude quickly and that's where we see them hit into the trees. there's actually another angle that appears from the back seat of this plane. sheriff's deputies also say that their landing gear may have clipped one of those treetops, causing them to flip over. eventually in the video, we see somebody pick up the camera. >> gosh, he seems unharmed. >> miraculously everybody survived this plane crash. the man who suffered the worst injuries was the pilot, 70-year-old