When someone creates a clay sculpture that is not hollowed out, it will explode massively in the kiln. This causes mass destruction to the rest of the sculptures in the kiln, often leaving few to no survivors.
Chase's sculpture blew up in the kiln, knocking down the shelf that held most of the other projects...The Claypocalypse has begun...
When you are attacked by handfuls of clay in retaliation to an ambush. This often leads to being completely covered in clay and needing to purchase a new cell phone, shoes, glasses, etc.
Our professor brought Dooms Clay upon three students when they attacked his ceramics class with nerf guns.