Voodoo Passion (1977)

Other mistake: Susan gets upstairs as Iris shows her the room. She manages to miss the naked woman lounging in bed - watching the scene, it's an impossibility. It might not be the proverbial elephant, but it's just something so very unusual and conspicuous in the room, in a spot perfectly in line of sight that it makes no sense Susan would miss it and be surprised by that later. (00:08:20)

Sammo