What I liked about some of the training (ie. bound hand and foot swimming) was that the instructor wanted his boys to hit that edge, either they'll panic or they'll come close to passing out trying to achieve their objective or they'll succeed by controlling their emotions and learning the proper technique on the fly. They get fished out in the first two and a smile in the third.
A couple of things, has anyone ever been swimming and tried to overcome stomach and/or leg cramps..quadricep for example. You'll sweat. To avoid being a mobile lunch bucket, you'll have parasites both internal and external. For the external ones like blood suckers and ticks...it's always handy to have a small mirror to check yourself over to find them...you don't want to have Leichimaniose developing unexpectedly. The internal stowaways don't like garlic-like substances, black acidic coffee..etc. The mini-bestioles, microbes and fungii that will seek to make your body a home are plentiful and knowing a bit of tropical pathology helps.
One thing that wasn't mentioned, maybe it's a secret Shhhh..., but there was a Legion bordello (for lack of a better word) where you didn't need a shot of penicillin after visiting. Is that building still open for business? It had some nice artwork behind the bar. Aside from that locale, there were a number of other places not too far from the base where you could get laid for a price (and yes, penicillin was obligatory afterwards). And aside from that, there were a few bars with rooms in the back...and with some of the Brazilian women, you had to be in damn good shape + have stamina...again, penicillin was obligatory.