I learned what a blown oring sounds and feels like at 20 ft at night! Basically it sounds like a loud pop, like a small caliber handgun at a distance. Also, the quantity of air flowing out was a little unnerving. I was still able to breath from the reg, but made a hasty ascent, not exactly textbook, I am ashamed to admit. I had been diving on the same tank the last few days, yes, yoke, did not bump it, tank was not overfilled, oring was extruded, but otherwise in good shape upon inspection on the surface. Did not check my SPG, so don't know how much air was lost, unfortunately, it would have been an interesting data point.
I have not known anyone who had the same experience, so I thought I would share here.
I have not known anyone who had the same experience, so I thought I would share here.