For those who have to watch over a place at night, the job is likely boring more often than it's particularly creepy. Sure, it might be pretty spooky during your first day, but those jitters tend to go away after you spend a few weeks watching nothing happen.
Still, many nighttime security guards can point to at least one thing that stayed with them years after the fact. Whether it's a strange sound, an eerie chill, or something they thought they saw, they might agree that even the most boring building can get a little creepy at night.
And that goes double when you're in a situation like this guard who has actual video evidence of what they saw.