RedactedNarrative: I was called from an employee regarding a female that was involved in a boat accident that was at the boat ramp.  I responded and when I was talking to the female she said that her head hurt.  She said that she was stopped when another PWC came doing circles around her and almost hit her.  The wake knocked her off and she hit her head.  She said that she lost consciousness.  I called for medical to check her out and also requested units assist with looking for the other PWC that had left the area.  Medical checked her out and she signed a release waiver wanting to be self transported.  I searched the area with other units for approximately an hour not being able to find the other PWC.