Thinking about "Something Evil" made me remember another little piece of a film I saw in the early 70's.
I think this was an older film, probably originally in black and white. There was something about a set of doors, maybe like French doors, that only opened once every 50 or 100 years.
I also think that a man got a bottle of acid dropped onto his face. I remember the fumes rising from his face, which is the Trauma part.