I have been trying for a few years to find the film that terrified my sister when we were kids, but with no success. It was shown on Sammy Terry's show, our local late night horror host here in Indianapolis, and we had snuck downstairs to watch it. It was well past our bedtime, and we were never allowed to watch anything that awesome, so this was a covert operation.
It was the opening scene of the film (or very near the beginning) and the setting was a very creepy, very dark Victorian mansion (or a castle?) on a stormy night (Classic!) People are gathered around the curtained bed of an old woman who had recently died, and when they pull back the bed curtains for the reveal, she is in full rigor mortis, eyes staring directly into the camera with a rictus grin.
My sister shrieked and bolted upstairs, we got in trouble, and that was it for Sammy Terry for a while. I was able to torment her with that face for a long time afterwards though, which felt like appropriate payback for ruining a good time!
That was decades ago, but I'd love to find the film to see if it's as terrifying now as it was then, and because (obviously!) I need to retraumatize my sister.
Thank you so much for your help!