RedactedNarrative: Vessel 1 Operator backing from slip.  Operator stated that the Passenger/Injured was seated on the front of the boat as she performed her backing maneuver.  Operator stated she began driving forward but since the trim on the motor was too high, she had trouble steering and the Passenger/Injured was using his foot to push off the post opposite of the slip to steady the boat.  The Passenger/Injured person’s foot became wedged between the post and the boat causing injury.