Possible deciphering of the article:
She was loading something too heavy for the elevator, so it stopped and the object fell on her. Or maybe it it was not too heavy but it fell on her and the impact caused the elevator to stop.
I can think mod other possibilities, but the article needs to be rewritten.
That’s more or less my take.
The original writer and the editor need to be introduced to the fine art of ditch digging.
Another possibility —
I work with movers a lot. They will hold or keep pressing the “door open” button to get as much furniture and boxes loaded into the elevator as they can fit.
On some older elevators, if you hold or keep pressing the button too long, a little alarm will sound and the doors will close and sometimes will NOT bounce back, even if you wave your arm in from of them, like they usually will do. If you’re in the way, it’s very scary!
There is a red “hold” button in newer elevators, which works better, you still get the alarm but the doors don’t close.