I was very naughty on holiday and went down, not scuba but the one where you have the airline to up top. So I probably didn't go as deep as scuba, maybe around 8 metres? (25 feet). My boyfriend was with me, and we had an instructor between the two of us, so I was well supervised! I had no problems, and I was in the tail end of a flare (no gut probs, but fatigue and anaemic).