You're a security guard, your job is to lock the doors on all 11 floors, and also to search if there's any people still in the building.

On the 2nd floor, you found a woman still inside, she ask to exchange phone numbers but you declined. She left in anger.

On the 5th floor, as you were repairing the fuse at the electrical room, you turn around.

Worker: Hey, the light's still isn't turned on yet, go and check the second electrical room. I'll see you on the 11th floor.

(HORROR)