A door that you usually close behind you you leave open instead. Just on impulse. The room beyond is dark, no one is in it. At least no one should be in it. But, it’s dark, kind of mysterious and getting a bit creepy as you look at the open door. Is it just slightly opening wider, on it’s own? Is that a hand with talons at the ends of the fingers?
How far can you go and really creep yourself out before you get up and just close the damn door?