EE WAS DIGGING A ROCK OUT OF THE PIT FLOOR WITH THE OK SHOVEL. THE TEETH OF THE BUCKET SLIPPED OFF THE ROCK CAUSING HIS LEG TO HIT THE SEAT ADJUSTMENT LEVER. HE CLAIMS THE SEAT FELL SUDDENLY A ND JOLTED HIS NECK. THOUGHT HE WAS OK SAW A DR ON MAY 24TH SENT TO ANOTHER DR. WHO SAYS NO ACTIVIITY FOR TWO WEEKS.