RedactedNarrative: A PWC had floated away from bank to houseboat. The operator started the PWC while standing on the houseboat and attempted to get on. The PWC accelerated, which caused the operator to flip backward, hitting her head on the rear platform. 
  
  The PWC was hard to start/idle. The operator was using the throttle to keep the vessel running while getting on, and probably gripped the throttle while getting on.