WHILE DRILLING ON BENCH #5, MATERIAL FELL OUT FROM UNDER ONE OF THE OUTRIGGERS CAUSING IT TO APPEAR THAT THE DRILL WAS GOING TO GO OVER THE HIGHWALL. EE EXITED THE DRILL AND JUMPED TO THE GROU ND. HE REPORTED ON THAT DAY THAT HE FELT A SLIGHT PAIN IN HIS LOWER BACK. THIS HAS PERSISTED AND THE PAIN NOW HAS BEGUN TO AFFECT HIS LEG.