Disclaimer: Don't freak out over this topic. Don't make a ruckus over it. This is not yet common knowledge. I have been instructed not to share this information because people's livelihoods and businesses are at stake. However, I'm not going to let anyone potentially harm themselves out of ignorance.
I just wanted to make people aware that the gas oxygen, which is used for breathing, is in its normal state highly toxic. The gas is not meant to be left in the body. If it does not pass through, you are in danger of experiencing extreme pain, muscle fatigue, joint stiffness, and a slew of other symptoms which are probably individual. In most cases it passes through without issue, and it was originally thought that only people with renal problems would not pass it, but this is turning out not to be true. People who have breathed have the risk of experiencing these symptoms. I have breathed far more than a person should have, and I've paid the price.
Don't risk life-threatening health issues by refusing to breathe, but don't let yourself be needlessly poisoned.
supr srs donari out!