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I used to install and maintain MRIs (as well as some other medical imaging modalities) and this seems to be wrong any time I've ever seen it in media.
Years ago where I work a resident decided to be helpful and move a patient into the room with the MRI.
Of course, the patient was supposed to be transferred off the ferrous metal gurney before coming into the room. The resident didn't know that.
The MRI pulled the gurney into the room and it slammed into the scanner. Luckily it didn't actually flip up and crush the patient.
They told the patient to stay where he was and they loaded the gurney down with a bunch of full five gallon water bottles. Once they had enough weight on it, they transferred the patient off the gurney. A bunch of guys pulled the gurney out of the room, amazingly without any damage to the scanner.
Yes I had two separate occasions of having to remove a ferrous table from a magnet. One was able to be removed with 5 of us pulling (using a tie strap for safety to make sure it didn't fling when we repositioned it), but the other we had to ramp down the magnet to remove from the room.