There must be personality differences, of course. I'm trying to imagine my eldest (nearly Moody's age) believing he's indestructible. Although I think he probably does feel that way, I can't quite imagine him having the same sort of confidence as my youngest (22), who would have been hurling children into boats, leaping about, and thinking to himself that he'd manage somehow. Sea can't be that cold, fit, good swimmer, stuff to do etc. etc. They might both have done the job, but I think the elder would have had far more misgivings.
Mind you, the younger one told me yesterday that he has given up bungee-jumping after an experience at the weekend when he thought his eyes were falling out of their sockets. I've spent years telling him not to do this as we have a history of retinal detachment in the family - to no avail, of course. So, he's got away with it again. He's decided on his own not to do it again, and hasn't gone blind, lucky lad. And he's reluctantly decided that the extreme sports, which resulted in broken bones and torn ligaments, should be abandoned in favour of golf, parachuting, and diving. The latter, of course, requiring repaired teeth. Which brings me back to Moody, aged 24. I'm sure I remember Inger telling us he had simply terrible teeth problems, not that would have had any bearing on the night.