The 18th Century Origins of Horror Cinema
Long before movie theaters existed, showmen used magic lanterns to terrify audiences with moving ghosts. To ensure people really believed the spirits were real, organizers sometimes forced viewers to fast or ingest drugs.
Phantasmagoria shows were immersive psychological experiments designed to blur the line between reality and the supernatural. By hiding projectors behind semi-transparent screens, performers made specters appear to float through the dark. They enhanced the dread with smoke, strange odors, and even mild electric shocks to keep the audience on edge. This intense multisensory experience laid the groundwork for modern horror entertainment.
Source: Phantasmagoria