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I mean, they didn’t bother you guys.
The guy was just cold, and the gal had a personal moment. Not their fault, that you two little kids were scared of strangers.
Kidding aside, and assuming what you’ve written is neither internet-talk nor standard schizophrenia tendencies, it might be carbon monoxide poisoning. It was a phenomenon, with haunted houses very often just having faulty heaters of some kind, causing hallucinations in the right doses.