Skulls.
There was a movie called
The Skull about somebody buying the skull of the Maquis de Sade and much badness ensuing.
If you watch it now it is just laughably bad but when I was a kid a disembodied skull floating around really freaked me out. It might not have been so bad if the TV quality of the day had allowed me to see the obvious wires it was dangling from
The 'turning Mother round' bit towards the end of
Psycho gave me the willies as well.
I wish I didn't know now what I didn't know then