Animated gifs made of three frames of film. Not all are safe for work, though none are obscene. You might love it; it might make you feel a bit ill.

"…the ongoing charm and usefulness of the animated .gif lies in this very economy. Like a good one-liner, the animated .gif can tell a joke with the impact of a one-inch punch, trimming away the fat of unnecessary frames to deliver its message with streamlined effectiveness." All too true. And Simon gives me my own discovery of the day