Humans use facial expressions to either show or hide emotions, but artist Mike Pelletier has created a 3D animation titled "Parametric Expression" that personifies those emotions behind the expression — to a haunting and chilling effect. The non-descript, Prometheus-like faces explode into geometric shapes when they smile or scowl in Pelletier's animation, which he calls "a study of quantified emotion." Words can't really do the animation justice, so check out the art piece in the video and GIFs below.