You only hear your own footsteps as you walk to the office. As you step into the office, you see the secretary on the phone. You look around to see if anyone else is there. When you turn back to ask the secretary where the students are, she is gone.

You just had a thought. Did you miss an important school meeting? Your skin develops goose bumps and the hairs on your arms are standing on end.

You decide to walk around the building to find the secretary.

or

You pick up the phone to call the police.