I've been trying to remember what this one was for ages, and it terrified me when I was young. From what I can remember, this may not have been a movie, but more likely an episode of some series.
The scene I remember has a black teenager tied down to an operating table and he is surrounded by a horde of tormentors, one of which has very subtle clown makeup and is about to cut open his chest with a scalpel. I think he had a fear of surgery or something, and so it was likely something to do with nightmares coming to life. I think the kid may have had a yellow and black jumpsuit on, but that's not so clear.
Perhaps your readers can help!