text: When they tried it on the Mona Lisa, it shows that her emotions may have been some kind Da Vinci code with Dr. Huanfs emotion algorithms. It is really useful in computer and science class by how the face muscle move and how the computer analyizes the face and come back with the results. It can work at a normal PC at home, but you can test it by looking in a mirror, smile when your cheeks hurt and see if that is an emotion. It can be a use as an experiment a well, it might also made you a little happy now don't it.