As a result of crushing the skin between two hard objects, the skin and subcutaneous tissues split, resulting in split lacerations. When the skin is overstretched, it can tear, producing a flap of skin in the direction of the injury. An avulsion occurs when the skin separates from the tissues due to some grinding compression. Skin can be torn by irregularly directed impacts with blunt objects. In the case of chop laceration, something with a heavy edge like an ax produces lacerations.