Yep, if you look close, you can see that the person in the first car was getting up to leave the car, but when the train starts to move, he gets down again and pulls down the restraint.
One staff-member managed to pull his co-worker off the train (he injured his hand and had a small concussion)
I think that would've been the biggest problem: if the staff-member didn't get off the train in time...when it moved on.
they also were trained to evacuate from the back. something to do with people not seeing other people in front of them getting out..and walking past them.