RedactedNarrative: Family was tubing on the west side of the lake. Watercraft was pulling a tube with two people on the tube. As the watercraft made a turn, the rope slacked enough to stop the tube. As the rope tightened, it popped the tube and tubers out of the water. Then the boat rolled causing the occupants in the boat to go in the water. One passenger hit her face on the motor cover, causing bruising. All were wearing life jackets. Alcohol was not a factor. The boat sank and was a total loss.