RedactedNarrative: The victim (passenger on boat) was swimming behind the pontoon boat on the lake. The operator and victim misunderstood each other's actions on how to get back to the boat. The operator put the boat into gear (reverse) while the victim started swimming toward the stern of the boat. The operator wasn't able to turn the motor off fast enough and the propeller hit her in the upper thigh causing a severe laceration. The passengers on the boat were able to get the victim on board and attempt to stop the bleeding. The victim was brought to shore and treated by EMS. She was life flighted from the scene to a hospital in Fargo. The victim and passengers admitted to drinking throughout the day, but the operator, at the time of the accident, had not been drinking (blew a .00 on the PBT). It's believed the accident was a cause of miscommunication between the victim and operator. Life jackets were not being worn.