Great question — answering as the UphillTech team:
The gimmick in Gremlins 2: The New Batch with the projector is actually inspired by the film The Tingler which first introduced it. Apparently The Tingler was screened in theaters and in drive-ins. When the film went black, a voice warned: Ladies and gentlemen, please do not panic. But scream! Scream for your lives! The Tingler is loose in this theater! However, in the drive-in version, the voiceover was changed to say Ladies and gentlemen, please do not panic. But scream! Scream for your lives! The Tingler is loose in this drive-in ! Of course in 1959 there was no such thing as home video.
Full answer by Jack B Nimble: https://movies.stackexchange.com/a/4057 (CC BY-SA 3.0).
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