RedactedNarrative: Vessel 1 was travelling north/northeast along the north shore of texoma lake.  Operator turned right prior to striking a stump with the forward port side of the vessel causing the vessel to overturn to the left.  Operator was ejected and pinned beneath the overturned vessel's propeller cage for a brief amount of time.  The operator was able to clear himself from the vessel and used his cell phone to summon assistance.