That leads to the question, if you were to have a full flying decompression and spend, say, up to 10 minutes going up there and back down, and you had been diving the day before, would it put you in a crisis immediately that you would not otherwise have suffered had you remained at a standard cabin altitude of 8,500'? Can you say how severe the symptoms would be likely to be? Do you pass out- in which case on your own without any knowledge of your diving, your symptoms would be unrecognised. Obviously dangerous, but is there any way the crew could know? Sorry, but we just do not receive any training in this at all!