There was a cool airshow at the Santa Barbara airport a few years ago. We (including my mom, then in her late 80's) got to walk through a B-24 Liberator, down the narrow catwalk between the bomb bays.
There was a guy there who had piloted one during WWII, when he was probably about 20 years old. He described an incident when one of the crew slipped walking down the catwalk and ended up hanging off the exposed control cables running down the inside of the fuselage. It was only because they noticed that the controls were responding poorly and went back to check out the problem that they found and retrieved the guy.