This is a link to a vivid illustration about the insidious nature of carbon dioxide poisoning. Examining the entire incident, you will be struck by the amount of time it takes a diver to recover from high partial pressures of carbon dioxide in the bloodstream. This excellent video shows us all that a"sanity breath" just isn't enough to clear your mind. --Jill
CO2: The rebreather incident
CO2: The rebreather incident