RedactedNarrative: Two passengers were tubing where the water conditions were very choppy. The passengers were holding on until a large wave came out from under the vessel and tossed the tube up into midair. When the tube landed back on the water, it struck another wave that caused the tube to flip sideways, knocking both occupants off the tube. Upon contact with the water one of the tubers knee hit the side of the other tubers head. Both tubers got back onto the vessel, when the tuber that got hit in the head noticed he had an extreme headache and was not feeling well. The operator brought the vessel and passengers back to the yacht club and the injured tuber was put on a stretcher and taken to the hospital. The injured told the officer the next day that he had a concussion.