Yale University researchers say their study that used lasers to create remote-controlled fruit flies could lead to a better understanding of overeating and violence in humans. Using the lasers to stimulate specific brain cells, researchers say they were able to make the flies jump, walk, flap their wings and fly. Even headless flies took flight when researchers stimulated the correct neurons. Gero Miesenbock, associate professor of cell biology at Yale, said if the process could be duplicated on mice, researchers might be able to better understand the cellular activity that leads to certain behavior.