“The best explanation I have seen for this is that Mary Jo kicked Kennedy out of the car when he made a pass at her, and drove off the bridge herself, alone. Kennedy went back to the party and got taken to town without knowing what happened to her. They decided that it was best if he made up the story about him driving off the bridge.”
Suuure.....
I visited Martha’s Vineyard some years ago - the bridge had long since been taken down and replaced by a small Ferry (big raft) to move cars across the 100 foot or so span...and the water isn’t that deep there - one might be able to wade across.
No, the bridge is still there. They put some 6x6 wooden rails on the sides as they had none when he drive over. He was speeding down the drive and was drunk and simply went over the side of this little wooden bridge. The walk back to the ferry is a distance, as there was no ferry he swam across to his hotel, which was not far from the other side.