My parents used to live on the east coast. They lived in an apartment building. For a couple of days they said there was a man in the lobby painting a picture. They both saw him and said they tried to say hi and smile at him but he never responded. He was only there for a couple of days. They didn’t think much of him at the time. He wasn’t rude mind you, it was just like he didn’t know that anyone existed.
After he was gone a couple of weeks My parents mentioned it casually to someone else who lived in the building. They said they never saw him. This was weird to my parents because they said he was there like 24/7 for those couple days. He was tight in the lobby. No one could have missed him.
They asked a couple more people in the building and they had the same response, no one saw him. My mom became curious and even asked the maintenance man. He had no idea what she was talking about. My parents were the only ones that saw this guy painting right in the lobby. They both even smelled the paints he was using.
I’m not saying this was paranormal or anything, but it is strange that no one else even noticed this guy painting in the middle of the lobby.