The main reason McDonald's will never break out of the lumpen-proletariat ghetto is because the food just isn't good for you. The most talked-about movie of last month's Sundance Film Festival was Super Size Me, a documentary in which a healthy, 33-year-old man conducts an experiment in which he eats nothing but McDonald's food for a month. (To up the stakes, every time a member of staff says, 'Would you like me to super-size that for you, sir?' he has to say yes.) Thirty days later, his cholesterol level has skyrocketed, his liver is clogged with fat, he's suffering from asthma, chest pains, depression, headaches and heart palpitations, and he's gained 25lbs.