I came across this whilst searching for Matrix breakdowns. A nice little composite breakdown, and all done in After Effects too.
UPDATE: As my final project is going to feature Lego, I took another look at this. This scene is all computer generated rather than stop motion, but it still shows me that you can use real world images, in this case, the cityscape background, and blend it with Lego to look good. Although I am using actual Lego, I still hope to feature this kind of imagery to make the Lego world look more realistic.