Originally Posted by
nk15
Also, remember, the co-pilot was breathing normally and did not utter a word during these 8 minutes. If he was having any kind of medical issue or panicked or trying to deal with an emergency, or anything, he would have made a sound, said something, some kind of vocal reaction. He pressumably didn't have any vocalization of any sort, other than normal breathing, even though there was banging on the door, passenger cries, plane descenting, etc. This alone pretty much rules out any alternative explanations, IMO.
Be mindful that a complete psychotic episode is also a medical issue. It would not be unrealistic to have a person with unfounded psychiatric issues (depression not included, I am talking about full on psychosis), suddenly faced with a moment of isolation when is coworker leaves, to suddenly have such an episode trigger.
This is a hypothetical situation where having the two person cockpit rule would help. Anyone who has ever experienced any sort of sudden psychotic episode, panic attack, blackout in which they do something inexplicable......occur in either themselves or a loved one - its not so far fetched. That type of situation is not considered malicious, its a switch in the brain that suddenly short circuits.