Dry firing, ejectors, etc.

[Woodcock survey]

Do not recall the make of o/u that a woman at my club was trying out belonging to another member. She took it home and the next day no one, owner included could put it back together. It was in a breakdown case and had to be re-assembled. After listening to the gnashing of teeth i recalled tripped ejectors being discussed on this forum and took the forearm inside and using a pencil eraser end cocked it and put it together.
I could not understand how it was in that tripped state until i fired it opened it tripped the ejectors and took the forearm off without closing the barrels. Not closing it allowed the ejectors to not cock.