it looked as if all of a sudden he just lost radio control ... hey you never know, it could have gone into failsafe because someone else turned a radio on on the same channel .... its possible that it could have been someone other than the pilot who was 100% responsible.. We often think of getting shot down as a risk to our planes, but often it can be a risk to human life. I have seen planes get locked out by some numb nut who turned on, and caused a plane to crash near people.. Frequency control is something we also need to pay great attention to at all times !