I've never been in anything near a real emergency (1 drowning, but it wasn't me, and it was swimming without scuba gear). I have panicked - several times, all while removing my mask on purpose. I am training myself to get better. I have been lost due to low visibility and did not panic, and hope I'd react the same if lost due to current. As you said, we all hope everyone's reaction would be calm and deliberate if things are either borderline dangerous or a real life-or-death situation. Reading threads like this is going to do the opposite - make it more likely people panic.
@bvbellomo. You are wrong about thinking reading threads like this one is going to make it more likely people panic. Panic often occurs when people are not educated about what can happen when certain situations arise, do not think about those situations, and do not practice or give serious thought as to what options are possible. This is why military and professional pilots read everything they can about aircraft accident reports, practice emergency procedures in simulators, flight and oral evaluations, and discuss "what ifs" with other aviators while enjoying a beer at the end of the flight day or week. Knowledge is power! I do not believe you can find any experienced military pilot, especially ones that have successfully dealt with serious inflight emergencies, that would concur with your statement.