From 'Exotica. Fabricated soundscapes in a real world' by David Toop:
"In the sleevenotes of Les Baxter's 1970 soundtrack for Gordon Hessler's American International film, Cry Of The Banshee, Baxter archly reported that one passage in the music had been reported by friends 'to cause an apparition to materialize. I had no idea, in my own writing, that such a thing was taking place, although every composer knows that sometimes when he is writing he will write things he doesn't remember, as if they come from an "outside" source. Whatever caused this, some said that during this particular passage they thought they saw Satan materialize - others were not sure just who the spiritual image was, but I feel I must warn those who have a fear of the supernatural of the possibility of such an occurence."
Find the record sleeve - including the notes! - and a rip of the soundtrack here.