Why is Pete Wentz mid-air between two cars? It's because he's kicking off the Mercedes Benz Tweet Race. Wentz, along with Rev Run, Serena Wililams and Yankee Nick Swisher are heading teams that are racing to the Super Bowl in Dallas for charity. Their cars, while driven by humans, are "fueled" be tweets from fans. Follow @MbtweetraceHQ for more details.