What to do in a subway emergency

It wasn't the normal morning commute from Washington Heights to Harlem for Kelly Kopp. A video shows him and others making their way off the A train with the help of MTA workers after it abruptly stopped. But an hour before, Kopp and everyone else were panicking and fearing the worst. People got their cellphone flashlights out to help. Others also tried to pry the door open. One man managed to kick a window open. Kopp said he managed to get out the window and into the tunnel.