A pool for images depicting body parts, such as arms, legs, a person's head, or breasts that are not visually connected to where they should be (like an arm should be connected to the shoulder, not the hip), or would otherwise makes no anatomical or logical sense on how it's supposed to work.
They may be on any other part of the body or not even connected to a living thing. (Body parts separated from the body by a gap or portal count as unexplained, as they are not visually connected to the body)
Note: This pool used to be "unexplained breasts", but has been changed to body parts to widen its usefulness and, honestly, because there aren't that many floating breasts by artists other than ao usagi
