63 days submerged was my longest run between surfacing. Before women in subs it was a locker room mentality so boredom led to stupid stunts and jokes. Frat boy crap like duct taping someone to the overhead. Fight club. Beauty contests in bikinis (dudes). Cutting people’s belts down slowly so they think they are gaining weight. Shit like that. Hard to do? Get the poop over board without accidentally blowing it back inside. Making oxygen to breathe. Boring stuff but harder in a steel tube at 500 feet below the surface…