A panda is sitting in a bar, polishing off his dinner. He pulls out a gun, fires a shot in the air, and heads toward the exit. A stunned waiter demands an explanation. The panda pauses at the door and tosses the waiter a badly punctuated wildlife manual. “I’m a panda—look it up.” The waiter turns to the appropriate entry: “Panda. Large black-and-white bear-like mammal, native to China. Eats, shoots and leaves.” 
Beware the missing Oxford comma!
That was the lesson of a recent decision by the First Circuit Court of Appeals, which held that the omission of an Oxford comma in a Maine employment statute created an ambiguity that must be resolved in favor of dairy delivery drivers. For want of a comma, the dairy is out $10 million.