Are there any occurrences of supernatural beings that look like humans?

My friend and i met a man who looked like a normal man but he was unusual, i didnt know how to explain it but when we talked to him it you could tell something was strange. We were told his name was Henry but i had a feeling that wasn't his name, and by the way im not a conspiracy theorist or anything and don't really believe in the supernatural but the whole experience was just very unusual . He didn't do any weird tricks or predict anything or disappear or anything, but it was like i said very unusual. But my friend said that people have reported people like that before and are talked to by the FBI but my question is have there been occurrences of people who appear to look like humans but appear to be strange or "different"?