Caught in, under or between a moving and a stationary object
THE MINER OPERATOR WAS TRAMMING THE MINER TO A FRESH CUT. HE LOOKED OVER HIS LEFT SHOULDER TO SEE WHERE THE MINER HELPER WAS. THE MINER RAN OVER A SMALL ROLL IN THE BOTTOM, CAUSING THE MACHINE TO TEETER-TOTTER. THE OPERATOR'S HEAD WAS BETWEEN THE MACHINE DECK AND THE MINE ROOF. THIS RESULTED IN BURSTING THE OPERATOR'S HARD HAT.