Operator stated he was operating his PWC along the Hemenway wall headed to the Hoover Dam when he got water in his eyes.  Operator stated that  he saw the wall coming up and jumped off the PWC, and it then slammed into the rock wall without him aboard.  Operator stated he was uninjured and he then  motored the PWC back to Las Vegas Boat Harbor where they called NPS.
Boulder City                  