Clarence Eckerson may have set an all-time speed record for the production of this inspiring StreetFilm on Park(ing) Day 2007. It’s a good one.

Seeing pre-schoolers participating in an outdoor music class — in a parking space — on Brooklyn’s busy Cortelyou Rd., you definitely get the feeling that Park(ing) Day has, in just a few short years, transformed from a quirky art activist event into the beginnings of a broad-based grassroots movement with meaningful social and political implications. On Friday, Park(ing) events were set up in about 150 spots across 42 U.S. cities along with events in five or six other countries, according to the Trust for Public Land.

In PlaNYC 2030, the Bloomberg Administration said that it wants to build a park within 10 minutes walking distance of every neighborhood in the city. On Friday, a bunch of New Yorkers went out and began implementing that plan, simply by turning on-street parking spaces into pocket parks and public plazas.

Eckerson writes:

National PARK(ing) Day was a huge hit here in NYC where Transportation Alternatives & The Trust for Public Land organized a of group of motley advocates in liberating parking spaces to open green areas for city residents to enjoy. Last year, NYC had just one spot, but this year nearly two dozen were sponsored across the city – ranging from a mini-gym on Bedford Avenue in Brooklyn to a tribal village (complete with tee pee!) on Manhattan’s West Side.

Most amazing was the overwhelmingly positive response the event received. Residents, tourists, commuters, and drivers (yes drivers!) were seen voicing approval. Peds relished the chance to take a seat or diddle their feet in fresh sod. Some ate pizza.