EE WAS ASSIGNED HOUSEKEEPING DUTIES AROUND THE COLD-END OF THE CALCINATION AREA. AS HE WAS WASHING DOWN, THE 1"" HOSE DEVELOPED A KINK CAUSING WATER PRESSURE TO DROP OFF. AS HE PULLED ON THE HOSE TO REMOVE THE KINK, THE WATER PRESSURE OUT THE END INCREASED & JERKED THE HOSE OUT OF HIS HAND. THE HOSE WHIPPED AROUND & THE COUPLING HITHIM ON THE LEG.