Laugh if you want but many years ago I was changing my middle sons diaper on an old dresser in our last house.
He is 11 now, and I don't recall how old he was at the time, but old enough to not do the random uncontrolled infant movement thing (normal response to stimuli) yet young enough to still be pissing in a diaper
, but not old enough to do make believe shit or try to "pull one over on me".
As I'm changing him, he looks up at the ceiling, in a very particular spot above my right shoulder. And laughs. Didn't think much of it, and he stops, pauses, looking at the same spot. And breaks out in laughter again. Cooing and looking, focused eyes tracking one spot over my shoulder. I paused changing his diaper and looked slowly over my right shoulder up at the popcorn ceiling.
Nothing there of course. As I finish up changing his diaper, he does it again. The hair was standing up on the back of my neck at this point, I didn't bother looking up again, stuffed him back in his onsie or whatever and went on with life. Still creeps me the fuck out to this day though, I have 3 kids and nothing out of the ordinary has ever happened but I got a really weird (but not negative or evil) vibe from that experience.