I saw a documentary on BBC America that told that JFK was killed when one of his bodyguards guns went off.
I have to say (if it's the one I'm thinking of) this is certainly one of the most compelling theories.
Oswalds first shot hit the road, his second shot did actually hit JFK in the neck. In the car behind, an inexperienced secret serviceman (according to sources, the others had had a big piss up the night before so he was seconded to the trailing car) picked up the rifle from the car's floor, and as he was looking behind at the book depository his gun went off after a jolt in the car (braking?) And that was the fatal shot.
Been a while since I saw that, and once again a theory. But like I said, compelling.
