During my neurosurgery residency, a professor posed this situation to me and my fellow residents: you are leaving a pro football game headed for the parking lot. Just outside the stadium, you see two drunks get into a fight. One drunk hits the other on the head with a beer bottle and the man goes down, unconscious. You notice that the man's pupils become unequal and his breathing labored. The police have been summoned, but what do you do personally to help?
Clearly, the man had intracranial bleeding, but before we could answer, the professor responded: I'll tell you what to do, he said, go as fast as you can to your car and beat the traffic, since everyone else will be standing around watching the man on the ground!
This seemed callous, to say the least, but he went on: what CAN you do? You are surgeons, he noted, not paramedics, not police officers. You have no OR with you, no scapels, no CT scanners...you are no better, perhaps worse, then the other bystanders there. If you get involved, you might get bashed on the head too, or make some mistake in emergency management. If you aren't equipped or trained to help in a situation, walk away before you become a victim too, or make a bad situation worse.
In this case, unless you are a trained rescue diver and are certain the man is in distress, what could you do? Staying there and trying to help resulted in abandoning your buddies, and could have left you stranded in low viz as a solo diver. The man might have suddenly reached out and pulled your mask or regulator out. He might have been psychotic for all you know. Most likely he was a student or inexperienced diver who simply didn't know what OK meant and thought you were being cute, or taunting him.
I have witnessed the unfortunate circumstance of someone doing CPR on an obese patient, only to have her wake up and ask why a resident was sitting on her chest? She was so heavy, and in such a deep sleep, that the nursing staff was convinced she had suffered a cardiac arrest (they could not hear her heart, feel her pulse, or get a blood pressure cuff on her arm).
The point of this rambling? Two-fold: 1) what looks like an emergency often isn't; and 2) unless you know what to do and are trained to do it, your first obligation is not to make two victims when there is only one.
Any follow up? Did you ever find out what was going on?