When I was kid living in Coronado I would sometimes see those UDT guys training out on The Strand connecting Coronado to the mainland. I had no idea at the time how much they were suffering. :o)
Whwn I was in Navy Basic Training a guy from UDT came into the classroom and talked to us about how much fun it was to be in UDT. Then he looked at us and said "But I can tell by looking at you, none of you are strong enough." The idea was, the right guy/s would say "We'll see about that." None of us did.