I can personally attest that this is not foolproof, if it is even the case. Those helium tanks you can buy for large parties knocked me out as a kid. Lost consc

I can personally attest that this is not foolproof, if it is even the case. Those helium tanks you can buy for large parties knocked me out as a kid. Lost consciousness fell to the ground, blacked out. Supervise your kids if you buy one!