I'm convinced there are ghosts of bros past that haunt gyms and do shit like that. I use to work 2nd shift and got out at 10:30 and would head to the 24 hour gym and there'd be me and one other person there until I got on any sort of weight bench or machine, then suddenly 3-4 people would appear out of nowhere and ask how long I'd be on it. This was a large gym, it's not like there weren't like 900 other things they could do.