The Office of Terror

Now, you're on your way to the closets. You have to walk a while and go up the stairs because you don't want to risk the power going out while your in the elevator. The electrical closet is at the end of the hall and as you walk your hear some strange noises. You call out and say, "Hello?" but you get no reply. It's in your head you tell yourself. As you open the door you hear the sound even clearer and it's from the closet. Do you leave or tell yourself no one's there?