INJURED STATED THAT HE WAS SITTING IN THE MANTRIP IN THE REAR COMPARTMENT, FACING IN THE OPPOSITE DIRECTION OF TRAVEL, WHEN THE NEXT THING HE KNEW, HE WAS LAYING THE TRACK AND THE MANTRIP DROV E AWAY. THE MANTRIP (RAILRUNNER) WAS TRAVELING TO THE SURFACE WITH A CREW ENDING THEIR SHIFT. NO ONE KNEW WHEN INJURED LEFT THE MANTRIP AS OTHERS WERE SITTING NEXT TO HIM. INJURED SUFFERED A