The marketers at Honda clearly wanted people to think this CR-V ad was so cool, that they had to share it. Well, they got me:
All of these illusions employ forced perspective, the same technique used in the Lord of the Rings movies to make the Hobbits appear tiny compared to Men, using similarly-sized actors. They are also beautifully executed (note how the fake shadows align perfectly with the sun's shadow in 'Bollards'). You can see how the illusions were made in the making-of video, but it's largely redundant, since the beauty of the commercial is that it reveals most tricks with a change in perspective. Check out the construction for "Doorway" and "Arches", though — it's quite impressive!