Normally when a person tries to prove a point they provide something that backs up there point I think you should reread that entire article I could copy and paste the entire article because it backs up everything I said but that would take up too much space I ll probably get murdered for telling you this but even without donning an oxygen mask a fit young person who doesn t smoke would probably not suffer unconsciousness during the brief period it takes for the aircraft to get down to below about 20 000 ft Anyone who did suffer unconsciousness would be unlikely to have brain damage because they would still have been breathing air even if at a pressure that did not sustain their brain at a fully functioning level and the unconsciousness would have been so brief Just get used to the reality Go arounds and sudden decompressions are seriously frightening but hardly ever dangerous The only people who love them are journalists 76 19 222 40