RedactedNarrative: Boat was towing a Big Bertha water tube using an approximately 50' rope.  Operator was making left and right turns to create a wake/wave.  Operator made a left turn, sending the water tube with two riders to the right.  The tube had enough speed/momentum that it started to run alongside boat.  Operator made a right turn, towards the water tube and one rider of the water tube was ejected into the water.  Operator continued to make right turn towards the ejected rider, operator saw the ejected rider when the boat was approximately 20' away.  The operator made a left turn to evade the ejected rider and the propeller of the boat swept the stomach of the ejected rider, causing injury, operator did not recall direction of travel.