RedactedNarrative: Vic 1 jumped off of Vessel 1 and was swimming behind the boat. Operator of V1 did not look behind him prior to putting the boat in reverse. He hacked the boat propeller into Vic 1. Prop struck Victim 1s left leg. Vic was not in a PFD. Taken to hospital. Sustained SBI. Vic was noted as being impaired by alcohol