Showing off how cool they really are, a bunch of teachers and parents of kids from P.S. 10 in Park Slope surprised the schoolyard with a flash mob. Even the principal and assistant principal got in on the act -- they are the two ladies in the video with the red boas.

At first some of the kids looked shocked. Like, what the heck is going on?! Others were smiling. Some have no expression, perhaps searching the flash mob for their mom or dad in fear. But then it turned into an all-out dance party, and like every time I watch one of these flash mobs, I got all teary-eyed. Don't laugh. I have no idea why. When I get happy, I cry. This made me happy. Prepare to get happy!

If you live in New York City, you probably know that Park Slope parents get a lot of flack. People pick on the stroller scene, the fact parents want to bring kids into bars. Now, I'm in the Cobble Hill section but my fellow Brooklyn parents don't deserve any of it. Bars are restaurants here, people! And it's not like we're bringing babies in at 1 a.m for a vodka tonic.

I feel like this video is redemption! Way to go, Park Slope parents! What a great bonding moment to end the school year.

Would you ever do a flash mob at your kid's school? What a celebration this one turned out to be, right?