Owner and witnesses were cruising approx 20 mph when they hit a double wake.  victim was riding up front in a seat and became airborne as the boat fell in to the trough between the wakes.  As the boat rose back up victim came down and landed on behind.  The combined force of the boat upward and victim downward caused injury to his back.  Dispatch was contacted victim was transported to the hospital by ambulance before I arrived.  I interviewed the operator (his dad) and the other occupants at the scene.
Newton                        