Marine Combat Diver course. They do something similar in the SEALs albeit much more aggresive. During dive certification this is usually where a lot of dudes washout.

At random, instructors fuck your shit up and spin you around, you're not allowed todo anything back. IDK the process, but they teach a multi-step process to check the valves, hoses, and regulator, with enough confidence and training it's much less anxiety inducing.

Ahh yes, the Puerto Rican credit card.

I love some of the bragging by connoisseurs of literature, and pointing out in their clout chasing pics that the spines of their collection's have no wear marks from ever being open. 🤪

Is HK finally coming around towards the Civilian market? Probably not, but this letter might fill you with some false hope that they will.