What do you call cheese that's not yours? Stolen. Michael Richards learned that punch line Saturday after, authorities said, he scuffled with a 7-Eleven cashier on Chicago's Near West Side who tried to stop him from helping himself to the nacho fixings. Richards, 50, of Chicago, bought a bag of chips from the store, then began pumping hot cheese from the toppings bar into the open bag, authorities said. But the cashier warned him that the nacho toppings bar is for use only by customers who purchase tortilla chips served in a traditional plastic tray, according to court records.