BTW, something I noticed a while ago in the trailer, and which I'm shocked no one else has mentioned--
The Animatrix rips off a shot that is featured in OCP's trailer. Remember where the shot with the horseman riding in slow motion?

Compare that to a shot from the short called "The Second Renaissance, Part 2":

You would have to watch both shots to really get the full impact of it, but I'm shocked at how blatantly the style of movement was copied...