Slam shut

Good question. I say it's an adverb. The dictionaries call it an adjective, but I can't see it. That would make "creak" a copulative in "the door creaked shut", and it decidedly is not. Look at "When the door slammed shut, the vase fell over." The dictionaries call that "over" an adverb.

The cell door flew open when he kicked it.

Excellent explanation.
Thank you very much.
While in "the vase fell over", I think that over modifies fell, but in "the cell door flew open", it seems to me "open" has more to do with the "cell door" than to do with the verb "flew".
That is my opinion. I am waiting for correction.

I think that this structure can be parsed/analyzed in much the same way as the "verb + it + adjective" construction.

He had washed the car clean. (the car is now clean as a result of his washing the car)

The cell door slammed shut behind him. (the door is now shut/closed as a result of his slamming the door)

In fact, if we just rearrange the sentence a bit, it becomes ex

Thank you very much.

stephenlearnerIn the sentence "The cell door slammed shut behind him", is shut an adjective?

Yes. At the end of the action you can say, "The door is shut".

It's a subject-oriented depictive secondary predication.

Thank you