You know, recently watched a video analysis of both films on Youtube, and the guy doing the vid raised an interesting point: There is a horror buried in the original nobody thinks of. The main Fly character... is a fly forced into having its intellect and very being turned into a humanlike state. The scientist has been turned into the white headed fly. Not only is the scientist in a literal hell, the fly is too, as it can't handle having its sentience raised so much, which is why it is violent. The fly, though treated as if its the scientist, is totally seperate. Both of them are living in a state of despair and horror.