You turn into an alley, then try the nearest door. You've got to be quick, before the mouse can catch up. Luckily, the door is unlocked. You slip into the room.
As your eyes adjust, you realize the room is, luckily, abandoned. Every piece of furniture is covered in a fine layer of dust, and anything fabric is rotting away. You see a window and crouch beneath it. You carefully peak out, and almost immediately see the mouse walking down the alley. They walk right past your hiding place. You duck out of sight.