Angus, Is He a Sprinkler Right Now?

Magnus, graham and angus investigate the body of a man found dead. They notice that his clothes are undamaged by any kind of struggle. As they do so, an enormous crab-like creature takes shape on the ceiling. Angus shoots it with a crossbow from his sleeve at the figure as he does. The monster turns into a giant sprinkler who sprays water all over them. It then begins to glow in bright orange light.