Dance Dares

So the past few days I've been hooked up on something called "Dance Dares". And you know what? I loooove them. I love them so much, that I'm thinking about doing it soon with some friends if they're brave enough to do it with me. If you don't know what dance dares are, it's just sneaking up behind a stranger, and dance without them noticing it. I've never tried it before, but it looks fun to me. Have you ever tried it, or seen someone do it?