For the most part, the virus isn't especially serious; people usually kick it in a few days. But for a lot of reasons, including the fact that we're unable to grow human norovirus in a controlled environment, we have to study the spread of the virus in other ways. That's where good ol' Larry comes in, helping us to model how puking could spread the illness. The spray can travel nearly 10 feet (!), and when even a tiny bit of the stuff can be enough to pass the disease on, it's important to get a grasp on exactly how the virus travels. It's widespread, too: 21 million cases are estimated in the U.S. annually, and the only virus more commonly reported is the common cold.