Think of something really sad then breath heavily
holly couldn't breathe so i gave her a paper bag so she could hyperventilate
To breathe excessively.
It speeds up.
you could pass out/run out of oxygen
Yes
You hyperventilate.
Free divers do but scuba divers do not need to. Scuba divers take their air with them and would have no need to hyperventilate.
stage page hyperventilate rage engage
Expel
well oyiosly no
You take in too much Oxygen and you have too little CO2. so when you hyperventilate you will feel tingling around your mouth, chest and finger tips. I wouldn't recamend this. it's kinda scary.
Take slow, deep breaths. Inhale through your nose, exhale through your mouth. Don't breathe too fast - you could hyperventilate, which would NOT be good under those circumstances!