Quoted:
Why do they keep vomiting air?

Quoted:






Technical
nonsense follows: Usually when you dive a dry suit you use the suit to
control buoyancy and you BC is backup. It is vital that you remain aware
of your orientation at all times or you feet fill with air and you will
flip upside down. This is bad because the valve you release excess air
with is high on your chest. If you are an idiot and get in this position
while ascending the air in the suit will continue to expand and you
will continue to increase your ascent rate. The most likely outcome is
the bends and possibly death. Though if you are careful with your weight
and your awareness this won't be a problem.