In the mid 1940s, Fritz Heider and Mary-Ann Simmel created a simple animation on “An experimental study of apparent behaviour” – They asked observers to describe what they saw in the film. Most observers developed elaborate stories about the circle and the little triangle being in love, about the big-bad grey triangle trying to steal away the circle, about the blue triangle fighting back, yelling to his love to escape into the house, and following her inside where they embraced and lived happily ever after. More information and how it relates to modern day animation and game design can be found here