Barrelchumblers are the primary inhabitants of Ding Dang Tower. They are gremblins who believe that the purpose of life is barrels. A barrelchumbler selects a barrel full of gunpowder early on in its life and spends the rest of its days waddling around dangerous, flame-filled interiors while grunting. It is common to witness barrelchumblers bumble into vomiting furnaces and explode. Natural philosophers hypothesize that barrelchumblers believe that the barrels contain pure, barrel-like souls that can only be released by explosion.

If a barrelchumbler dies on its own, its barrel disappears.