Below is the trailer for the 1962 film The Brain That Wouldn't Die. From Lucas Balbo's article on that film's director, Joseph Green, in the first Shock Xpress book:
"While [The Awful] Dr Orloff made its impression through its superb photography and Gothic atmosphere, Les Yeux [Sans Visage] through its gloomy, macabre realism, The Brain [That Wouldn't Die] struck me with its sleazy delirium. It is like seeing your nightmares on screen: everything looks real, but as soon as you start to think about it it's totally unbelievable. Add to that the minimalist dialogue ("Hey, you out there in the closet, get out and free me!") and the tongue-in-cheek humour and you have a genuine classic of weirdness."