On some very elemental level, this is how life should be- colorful, bouyant, and free. And in San Francisco of course... When people say "a child-like wonder", this is how I imagine it would be.
[click picture for high-res video- it'll take a while and you need Quick Time 7. But trust me, it's oh so worth it... This is the low-res version.]
Check this site out for more info on the video clip.