RedactedNarrative: Vessel was pulling a tube with two persons on it.  The tubers were sitting side by side and when the hit a wake, the victim hit the other tuber.  The Victim had just recovered from a brain operation and was hit hard in the head by the other tubers head.  The victim was treated and transported to the hospital by EMS.  There was no injury visible.
NameOfBodyOfWater: Lake Cascade
NearestCityTown: Cascade                       