It's a classic flight or fight test. What would you do if you saw a murder in progress? Well, some people wanted to put that to the test.

These guys wanted to see how people would react if the elevator doors opened and they saw two men struggling on the elevator. One of them is strangling the other one with a rope.

A ton of people just ran away, but another large chunk of people actually tried to stop the fight.

What do you think you would do? A ton of us would like to think we'd try and help, but then there's that risk you could get involved and hurt yourself. What do you do?