A Shadow
They passed through the doorway and came to another corridor. Harley suddenly let out a loud bark. Matty slipped, sending waves of stagnant water to the far side to lap at the walls.
As he flailed, his wild flashlight beam revealed a dark silhouette of someone crouching on the far wall as he scrabbled to get up. Jesse swung his flashlight blindly in the direction of the figure, but it was gone.