An employee was pushing a stand of drill pipe to its stowed position. While pushing the drill pipe, he slipped and fell forward. He placed his right hand on the deck to catch his fall. The stand of drill pipe swung back towards the injured employee as the driller was lowering the top drive to catch the stand, before it swung across the mast. The stand of drill pipe was then set down on the injured employee's right hand, amputating his ring finger.