What if there were a new, fun way to pay for a Coke? And what if you could do it with your energy? That's exactly what happened when Coca-Cola launched the Happy Cycle and invited people to ride a whimsical bike and trade their calories for a Coke. It's the latest delightful example of Coca-Cola's worldwide stunts that bring people and happiness together. Which begs the question: "Where will happiness strike next?"