INJURED WAS REACHING FOR A MARKER ON THE BACK SHELF IN THE WAREHOUSE CUBICLE. HE STEPPED ON A GEAR PULLER THAT WAS LEFT IN THE WALKWAY. THE PULLER ROLLED CAUSING INJURED TO FALL AGAINST THE MI NER BITS STORED IN THE CUBICLE. OPERATOR WAS NOT MADE AWARE OF A REPORTABLE ACCIDENT UNTIL APRIL 26TH WHEN HE CAME BACK TO WORK.