From ABC News: A customer used the drive through at a Starbucks in Moline, IL over the weekend. That person paid for his or her drink and the order of the person in the next car. That started a chain reaction of people paying for the next customer's drinks. Before it was all over, 160 customers took part! GMH
http://abclocal.go.com/wls/story?section=news/state&id=6687815