Oh Flash Mobs How I Love Thee

I cannot get enough of watching flash mob improv sessions on YouTube - I am totally hooked! Apparantly these have been around for an age, not too sure which rock I've been under because I've only recently heard of this, but I super love it! One of these vids is an actual flash mob event, the second, I believe, is a tv commercial in a flash mob style - still just as good. There's something neat about such unexpected, spontaneous things bringing people together and giving you a giggle in the process. Just super.