An all-too-common accident is one where an operator catches a body part in a pinch point. Pinchpoints usually involve two moving or one moving and one fixed surface. Possible human factor violations include the failure to provide adequate guarding, the removal of guarding, or the lack of an adequate interlock. With some equipment, residual risk may remain after reasonable attempts have been made to guard the operator against exposure to the pinch point. In such cases, warnings are likely necessary to alert operators to the hazard..