RedactedNarrative: Operator was traveling north on the Ouachita River when his vessel struck an object, believed to be a stump or down tree, under the surface of the water. Operator and occupant, were ejected from the vessel. Both subjects were wearing PFDs. Occupant sustained injuries to her left shoulder, seemingly due to impact with the vessel and a rod holder, while being ejected. Operator sustained no injuries and attempted to swim to the vessel, which was still in gear and spinning in a circle on the river. Another vessel coming up river saw the spinning boat and the subjects in the water. They picked up Operator and Occupant and were able to get the spinning boat stopped and Operator got back on board. An ambulance was called and Occupant was transported by Air Med for medical treatment. An investigation was carried out and evidence was gathered. Operator, who was checked out by EMS, was uninjured and was issued a citation for failure to wear a cutoff switch lanyard. Alcohol was not believed to be a contributing factor. PFD was used.