Newest theory is fuel vapors and landing light switch spark
My newest theory of the cause of the crash is there were fuel vapors on the cabin, and Gary switched on the landing light to cross the airport. The switch would not be explosion proof, and may have ignited fuel vapors, blasting anything not tied down through the doors that have weak latches. That would have included Gary, if his harness were not fastened. If he had stayed in, he may have made a successful emergency landing.... I like to think he would.