I vaguely remember watching a particularly strange movie on television in the 1970s. I was just a kid then, so my memory of it is pretty hazy. I'm hoping someone might know what the name of the movie is. Here's what little I remember: I'm pretty sure it was a black and white film. I remember a scene in which some scary looking creatures (not human?) were up high, possibly in a cart moving along a wire suspended in the air. The creatures were throwing things at the people below them. I seem to remember very busy, dramatic music playing during that scene. I also think there was a scene in which a person (or a couple of people?) were repeatedly dunked under water while restrained, or in a stockade (?). One of the people being dunked may have been an obese man, but I can't remember for sure. That's about all I can remember. Does anyone know what film I'm talking about?