How did she know how to slamdance like that, you may ask? Some things are not taught. You just know.
I first heard the Bad Brains when I was 12, after their eponymous cassette came out on ROIR Records. And you know what, I did the exact same thing this little kid is doing in the video.
Link: "Adeline hears Bad Brains for the first time."
(thanks, Sean Bonner, via Vice)