When I first saw this creepy little video, I thought it was no big deal. I figured someone was inside of this closet thing opening and shutting the door. Then, the lights conveniently go out right as the security guard walks up to it. However, as you'll see, it's not a closet anyone could really fit inside of.

Not exactly sure what's going on here, but it seems someone or something is trying this guy's attention. When the security guard gets up to the door that's slamming, you'll see it's a shallow compartment, maybe used to hold a fire hose at some point.