A deep sea fisherman thinks nothing of diving down to depths that puts huge pressure on his lungs. After all, he does this regularly. Without an oxygen tank.
I am nervous around water at the best of times, but this guy seems to be part fish. He doesn’t want to show off at holding his breath at that depth for two and a half minutes? Sheesh!
Not only that, but walking around on the ocean floor, which can have a lot of little nasties that would cut up your feet, and he doesn’t think anything of it!