Describe the event that got Knapp to quit drinking.

Knapp was visiting her friend Jennifer for Thanksgiving. After drinking too much, she began to play games with Jennifer's two young daughters. She put one child on her back and the other around her front. Knapp, now weighed down by 130 pounds worth of children's weight, runs up and down the street. She trips and comes crashing down onto the pavement. Thankfully, Knapp does not harm either of the children.