So what would you do...
If you were waiting for an elevator, and when the doors opened, there was someone being murdered inside?!? Check out the reactions:
I personally think I would take a pic, then hop in and try to help. The pic would be in case the guy got away, and since he's just strangling the guy, that's not THAT dangerous of a weapon. AND his hands are already pre-occupied.
What would YOU do?