 He turned off the autopilot function. He turned off something to do with the emergency alert systems in the plane such that ground control could not contact him. And when he was on a collision course with a commercial passenger airplane with something like 300 people on it, they were trying to buzz him and say, get out of the way, get out of the way, and he wouldn't do it. So they had to divert that flight so that he wouldn't hit it.