EE WAS WALKING ON AN AREA IN WHICH A LONG & NARROW PIECE OF PLYWOOD WAS PLACED TO ""LEVEL OUT"" OR COVER LARGE ROCKS. THIS MORNING WAS THE FIRST RAIN AFTER A LONG PERIOD WITHOUT ANY RAIN. THE PL YWOOD WAS EXTREMELY SLIPPERY. EE DISLOCATED HIS SHOULDER WHEN HE TRIED TO CATCH HIMSELF FROM THE FALL.