I've just spent an hour watching videos of flashmobs online. I've decided this is my favorite one so far:
Is it wrong that I wished this would happen every day of my life?
This one is good, too, but it loses street cred because I think they're all paid:
But that's it! I'm not even going to show you the one with the dancing inmates doing Thriller.
Okay, just one more (first half is best):