An employee was working with makeup tongs (manual pipe tongs) to make them clasp. The top drive torque spun counter clockwise, causing the tongs to clasp and the snub line to pull tight. The entire pipe stand flexed and the pin end lost contact with the floor, skidding backward toward the injured employee. The tongs and stand of drill pipe struck the employee on their left side resulting in fractures to the left tibia, fibula, and ulna.