LOADER WAS LOADING TRUCK & DROPPED ROCK IN TRUCK BED CAUSING A POSSIBLE RUPTURE TO TRUCK DRIVER. EE DID NOT RECEIVE ANY ON SCENE MEDICAL TREATMENT BUT DID GO TO THE DR ON FRI 6/23/00. IT WAS N OT REPORTED AT THE TIME & NO REPORT WAS FILLED OUT UNTIL TUES 6/27/00. EMPLOYEE MISSED 6/23/00 & 6/26/00.