Google’s Prius struck another Prius, which then struck her Honda Accord that her brother was driving. That Accord then struck another Honda Accord, and the second Accord hit a separate, non-Google-owned Prius. http://jalopnik.com/5828101/this-is-googles-first-self+driving-car-crash 
Damn I was hoping this thread was more along the lines of Girls Gone Wild.