A few years ago there was a story in one of the sailing mags about a guy who was racing, solo, somewhere on the great lakes on a tartan 37. He went down below, through one of the seat
hatches, to rotate the prop shaft so the twin blade would be tucked behind the keel. While he was below the boat rolled causing the
hatch to close and lock. He panicked and started punching the bottom of the seat breaking his hand. Finally he remembered a trick he and his wife used to open the window of their summer home when they forgot the key. He gently rapped the bottom of the seat while hitting the front at the same time, eventually this shook the latch loose and he climbed out.
When he came out all of the other sailboats in the race had disappeared. He kept on trucking, found the landmark that represented the w/w mark, rounded and eventually finished the race only to find out that he'd won. While he was locked below the other boats had rounded the wrong mark and followed each other like Lemmings. Had he been on deck he speculated that he would have followed the others.
(I forgot to state the obvious, he had the auto pilot on)