While Sheldon napped, a gang of snails and hermit crabs pried off his shell and scuttled away with it. Now he is out on the shoreline, pale back to the sky, fighting them with whatever the tide dragged in.
He is extremely vulnerable. They know it. They will not stop mentioning it.
Don't step in the slime. Watch for the crab that throws his house. Nunchaku only swing when something wanders into reach. Spend every point between waves.