EE WAS HAULING MEGA-BLOCKS TO THE SECTION WITH A SCOOP. HE HAD EXITED THE SCOOP & WAS WALKING BACK TO CHECK FOR CLEARANCE WHEN HE STEPPED ON UNEVEN GROUND & IN MUD & TWISTED HIS LEFT ANKLE. THIS INJURY DID NOT INVOLE ANY ASPECT OF COMPLIANCE WITH RULES OR REGULATIONS, JOB SKILLS OR ATTITUDE. Amendment: Returned to dr 2/20/06-has recurring pain. Back on restricted duty.