RedactedNarrative: The operator was towing the victim on a wakeboard when the wakeboard dipped down into a wake and stopped moving forward. The victim felt the wakeboard stop so he let go of the tow line and landed with out stretched arms. The victim felt his arms go above his head with the left arm going behind his head cause a dislocation of the left shoulder. The operator turned back around and the occupants tried to get the victim back into the vessel but could not. Another vessel in the area went to the victim and helped him aboard. EMS was called and met the victim at the docks. The victim was transported to the hospital by ambulance.