I recently read something about him, written by the friend who played a part in his death through no fault of his own. Apparently, Denver was out flying his plane one day over California and decided on a whim to buzz the friends home further out on the coast, completely forgetting to check his fuel level. He crashed the plane on his return flight when he ran out of fuel. How this was known to the friend who wrote about the incident escapes me now. This friend was a conservative and I was a little surprised to learn they were friends. Who the friend was also escapes me.
Just checked...it was Clint Eastwoods house he buzzed.