If you've already seen it it's worth seeing it again. There are no special effects involved in this commercial.

Video link: http://www.boardsmag.com/screeningroom/commercials/581/

Snopes article on how they did it;


Wieden+Kennedy staffers swear that no trick photography was used and that the final successful run-through was filmed in real time. The only voice in the ad is from Garrison Keillor, who intones at the end, "Isn't it nice when things just work?"2 Although it is true that special effects were eschewed in favor of live action, the commercial wasn't derived from a single take. The final result comprised two takes stitched together with a brief bit of CGI: The Honda ad was created without special effects. It was split into two continuous takes only because no studio was big enough to accommodate the entire sequence. The only post-production trickery is the lighting on the car doors at the end.3