Your brain can only be Oxygen deprived for so long. I felt like those helpless victims in Jaws. What would be worse? Getting ripped apart by that giant sea monster or not being able to get to the surface for a breath? One time in high school a jock had cold-cocked me upside the head for calling his sister a tramp. Afterwards I couldn’t stand straight or stop the ringing in my ears. This was no different, although that was a smidge more enjoyable.