RedactedNarrative: A 4-year-old was placed onto the personal watercraft (WC #1) from the dock, as his older brother (19-year-old) was going to give him a ride. The older brother was standing in the water holding onto the side of the PWC before boarding himself. During this time, the 4-year-old child started the PWC and grabbed the throttle. The PWC rapidly accelerated toward the dock and shoreline. The PWC struck the dock, throwing the child in 6 - 12 inches of water. The PWC continued under the dock coming to rest on the rocks of the west shoreline of the lake. The child sustained facial lacerations as a result of striking the dock. He was transported by ambulance to the medical center for further evaluation. Life jackets were being worn and alcohol was not a factor. There was some damage to the PWC.