Running out of gas is one thing, running out of air...that's a little tougher when you're underwater. Talk about dumb stuff and not following procedures! About 25 years ago I was scuba diving off Gloucester about a half mile offshore. Had a tank with a J valve you'd pull to go into reserve. Pulled it...nada, no air. Was already on reserve when I went in the water. Long swim back and had to sacrifice a weight belt to stay afloat. Yep, didn't wear my MayWest that day either!
Got to shore and when I'd recovered, borrowed a tank, went back out to prove to myself I could do it and have never dived again.
Dumb can be fatal, do your safety check EVERY time you ride. Want you all around for a long time.
SteveB