CONTRACTOR INSPECTION OF CLINKER COOLER, ENTERING THE MANHOLE RIGHT FOOT AND BODY INSIDE, LEFT FOOT CAUGHT EDGE OF MANHOLE WHEN FOOT WAS FREED, THE BOTTOM WAS FURTHER ANTICIPATED TO THE FLOOR. RIGHT FOOT SLIPPED BEFRORE LEFT FOOT GOT THROUGHHOLE. MAN WAS CAUGHT BEFORE HE FELL, HE TWISTED HIS BODY.