Willow stiffens when he hears the clatter and stares down the hall in the direction it came from. Her hackles rise, and she growls low in her throat. She is not a fighter, and she feels particularly weak right now, but she will try if she is forced to. She glances around for a place for her and Stiles to hide, and her eyes land on one of the open stalls before nudging him with her nose.