RedactedNarrative: V2 was drifting in the Lake and saw V1 off the bow of the boat traveling north from right to left past them.  V1 was pulling a tube and turned off the port side of V2 and came past the back of the boat and the tube swung out and struck the upper port side of V2 toward the back area of the hull.  The tube was carrying 2 people, a male and female, who were thrown after hitting V2.  Both were unresponsive and laying face down in the water.  Both were wearing life jackets.  V2 called for help and the first witness came over and transported one victim to shore.  Another boat came over and transported the other victim to shore.  Medics were called and victims were transported to the hospital/