The Disappearance of Chloe Marsh

You step into the bathroom. It seems that you have it all to yourself.

After taking care of your business, you wash your hands with a sigh. You still have a strange feeling in your gut about that dream you had in class. It seemed so real, like you were really there in the mud.

You dry your hands and notice some grafitti on the wall. It says: RIP CHLOE MARSH.

You frown. It's certainly a sad possibility. After all, it's October now. She's been missing for five months. You grab another paper towel absentmindedly... until you notice something moving on the depenser.

"Ah!" you gasp.

On the paper towel despenser sits a big, black, hairy spider. It seems to be staring at you, tense. You're frozen. You've never seen a spider that big or terrifying. How in the world did it get in here!? You take a small step back. It reacts to your movement immediately. It spins and rushes along the wall. Your wide eyes follow it as it scurries across the floor into a corner blocked by the stalls. Without a thought, you follow it and see it moving up the wall towards an open window.

What do you do?