What would you do if you stumbled across a murder?

Like I mean an actual murder. Taking place right in front of you. Pull out your camera phone? Jump in and be the hero? Call the police? Run like a bitch (probably the most realistic answer)?

Some sicko's experimented and set up a fake murder taking place in an elevator. Check out how people reacted...
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Turns out that it's an advert for the movie 'Dead Man Down'. Never heard of it. But you done know I wanna watch that shit now...

~Cee