RedactedNarrative: Watercraft #2 (a kayak) had two occupants. The occupants were adjusting position in choppy water causing the kayak to capsize. The occupants went in the water and were not wearing life jackets. A passerby (Watercraft #1) was attempting to help the people in the water, when his watercraft floated over them. The male occupant of the kayak was cut by WC #1's propeller, causing lacerations to his arm. The injured party was transported to the hospital. Alcohol was not a factor.