You can pass out from you over expanding your diaphragm. When you take a deep breath that has the sensation of tension on your diaphragm, can cause you to black out (vision fades, your muscles loosen) causing you to fall over and wake up in a mater of seconds, to find that you are covered in bruises.
What makes you pass out is the lack of oxygen you get if your taking to many hits too quickly and not breathing in between them or if you hold it in for long enough and you pass out from oxygen deficicency.
There is only so long your body can take holding breath before you pass out or drown, Anything that is over 15-20 seconds is going over the limit, but some lungs can last longer.
if you stop breathing due to blockages in the lungs or esophagus, then you cannot breathe, if you pass out, your natural body system kicks in and keeps you breathing.
not possible
Yes, but if you increase the speed of your breathing too much you can hyperventilate and / or pass out.
Breathing from the exhaust exit, one would pass out after about 8 minutes
Depends on how long your hair is.
100 %
100 %
navigable
In the capillaries surrounding the alveoli in the lungs
sure...but do you really want to pass on those genes?