"N2O can cause numbness, general anesthetic, but no loss of consciousness. If inhaled gas from a balloon is effective only in a short time only, so if you want to continue, "coffee", you will have more time breathing. This ongoing course will cause brain damage when inhaled this gas because you are depriving the brain of oxygen. When insufficient oxygen supply to the brain activity causes it to be "shocked" and from there you will have to act oddly, lost control. "
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