EMPLOYEE WAS RIDING A 3-WHEEL RIDE. EE STOPPED, WALKED AROUND THE FRONT OF THE RIDE AND WAS GOING TO UNLOAD SOME TANKS. WHEN EE UNLOADED ONE TANK, THE OTHER TANK ROLLED OVER ON THE PEDAL AND THE 3-WHEEL RIDE TOOK OFF AND KINDLY TWISTED HIS LEG, CAUSING THE INJURY (TWISTED KNEE).