By the sounds of it, Ford assumed that the door wasn't operational yet. The operator assumed that when Ford hit the button, he wanted the door to close.
What should have happened was when people came on set, someone should have pointed out "hey, these doors are hydraulic and fully operational, so you really don't want to be under them when they close, so be careful".
The idea is that you can't be responsible for your own safety until you've been informed of the risks to your safety.
Biting the hand that feeds IT
