Hello, first time posting here. Maybe someone can explain this away. Apologies if it’s the wrong subreddit. But this was really weird. Background, my wife and I live in a 5 floor apartment building with a parking structure. The top floor of the structure is the 6th floor. Last week, I went up to the top floor of the parking structure of the building that we live in here in Orange County, Ca. I got out of the elevator and started walking to my car. There was a strange noise building, but not l...