RedactedNarrative: The operator was cruising behind a larger vessel when he noticed the vessel ahead was slowing down. The operator turned the boat 30 degrees to starboard to avoid the vessel ahead and crossed over the wake. The hull smacked the water twice. At that time, the operator noticed that a passenger had rolled from his seat on the port side of the bow and was on his knees complaining about back pain. The operator turned back to the boat launch and met emergency personnel. One injured.