When she took her test for her certification, she had to go way deep in a very dark, cold rock quarry, clear her mask, get it back in place, and start coming back to the surface 15 feet at a time.
Not for me.
Gradual decompression - that’s why the 15 feet increments. Lets the body adjust for the change in pressure. The pressure deep down is pretty high.
Nor me. My guys are all certified and did night dives.