An interesting physical aspect of yurei (japanese ghost) is that they have no legs, trailing off instead into smoke-like wisps where a person's legs would normally be. The absence of legs fits with the general non-corporeality of the yurei, for their whole bodies are wraithlike and lacking in that outer boundary of skin or scale that holds other living things in shape. Legs serve to join creatures to the soil, they root being to the earth, and so to be legless is in a sense to be disengaged.