THE EE WAS RIDING A MANBUS WHEN THE BUS STRUCK THE RAILS BETWEEN THE TRACK & CAME TO A SUDDEN STOP, THROWING HIM TO THE FLOOR BOARD OF THE BUS. THE EE FELT PAIN IN HIS RT.LOWER LEG. EE WORKED FROM 4/29/04 TO 5/18/04 BEFORE HE HAD TO HAVE SURGERY ON HIS RT. LEG.