Here is a very simple animatic completed for the planning of my sound clip project. An animatic is a usually simple animation (but can just be stills) to help with timing a piece, as well as getting a more visual idea of what a piece may look like without investing a lot of time and effort to do it.
Some other example of animatics I have found, maybe not quite as complex as the one for Pixar's The Incredibles (as seen on their website) is this one for the video beneath it.
This is a very simple animatic, doodle on a lined writing pad by the look of it, but nevertheless gets the message across of what they are going for, and helps plan the timing if the beats and poses, even if that's sometimes with notes in the margins of the doodles. This is what animatics are about - conveying the main points of the animation as simply and quickly as possible.