RedactedNarrative: Unit 1 was traveling approximately 20mph with two occupants.  Occupant 1 was driving while occupant 2 was seated near the bow.  Occupant 2's hat blew off resulting in an attempt from both occupants to grab the hat.  When doing so, the motor kicked to the side, throwing both occupants overboard.  Occupant 2 suffered multiple propeller strikes as well as some fractures.