Yes! Working as an Instructor on the Maledives back in 1995 I used to see that I was able to finish the usual 60 minute dive with al my customers after this one hour ( I didn't like to send them up if not really nessecary).
The air consumtion of each diver in the group (usually 3-8 divers) was pretty different, I dive until today with Octopus and Air II, so as a service at our safety stop ( or ealier) I could provide two clients with air.
So it was not unusual that I ended up with 300-150 psi when exiting the water into the Doni.
One day the last customer exiting the water via the the ladder lost his snorkel he had attached to his BCD.
I saw it falling into the water and tried to grab it, but it sank.
So I had the great idea to follow the snorkel and get it back for my client.
Problem was that I was diving with only one 3lb weight for emergency cases of a customer ( I was used to that), which I had already passed to one of my divers during the safety stop and my tank was pretty light.
I did not check my SPG and headed down. Of course I realized how difficult that was but I was concentrated on getting this stupid snorkel and forced my way down and got pretty exhausted.
Since I'm was to dive with no weights or only very little, I had to exhale very deep.
In the moment I thought I could grab the snorkel in a split of a second I was OOA.
I knew immediately that I was in deep sh....., looked on my computer, saw 19m (60 fsw?), and did a NCESA (NOTCONTROLLEDSWIMMINGASCEND)!!
When I was fighting up I had the feeling that I would pass out, but suddenly the air came back, I looked on my computer and was at about 8m (20 something fsw).
I tried flaring, but of course popped up to the surface, only to realize that nobody on board had noticed my effort to get back that snorkel. Fortunately I later didn't show any sign of Deco sickness.
It was the most stupid thing I have ever done in my quite long diving career.
But at least I learned apart from the fact "You should not fight your way down for a customers stupid snorkel with hardly any air in your tank", that keeping your 2nd in your mouth in a OOA situation can have its benefits, because when you come to about 10m (33 feet) from the depht, you can breath from the remaining approximately 10bars (150psi), which were not enough to support you in greater dephts.......