Hello, I was much younger when I saw this movie, and I can only remember bits and pieces of it, but it has been driving me crazy trying to find out the name. It was in color and was maybe from the 60-70s? The main thing I remember from the movie was that it was like a big dome was put around the city. I think the people try to get out and run into the invisible wall. I think there was a Twilight Zone like that, but this was definately a movie. There are only a few people left, and there may be a carnival or something in it. I remember a guy going into some sort of little building or something and all these weird images going by in his mind. They looked like images of masks or something. Sorry I can't remember more, and that these memories are so incomplete.