These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Screenwriter Robb White relates a story in which some of the motors were installed in a theater in the Valley, to be ready in time for the release of The Tingler. On the evening before its release, A Nun's Story was playing in the theater, and the projectionist (who apparently hadn't been told about the motors) happened to wonder what that new, never-before-seen button in his booth was all about. Oops.
Fridge Brilliance: The one Tingler that was the main antagonist in the movie was harvested from a mute woman - someone who couldn't scream. We find out relatively quickly that its preferred method of killing is strangulation. Why? Because you can't scream if you're choked to death. If you die without screaming, a brand-new, full-power Tingler is waiting to be pulled out of you. In short, it was trying to reproduce.
Paranoia Fuel: Everyone has a Tingler in them. The only way to be safe is to scream.