Victim was operating lead PWC with his 11 year old nephew operating a second PWC behind him.  Victim made a sharp 180 turn at which time nephew did not see victim in time and did not have time to make an evasive maneuver.  Nephew's PWC struck victim's PWC head on slightly left of center at which time nephew's PWC ramped victim's PWC.  The stern of nephew's PWC struck victim in the head and left upper body at which time victim was ejected off the PWC into the water.
Wausau