Twitter conditioned me to write in a short bursts. So much so I am not sure why I bothered writing more than the headline.
It's called Vine. This new mobile service (which was acquired, not created by Twitter) allows you to lake nifty little video loops. But just like everything in twitter's micro-world, you can only have six seconds or less to play with.
See some of the videos here.
This ranks up there with GIFs. In fact this may be the new GIF.