Also if you think that shit is written or something you should check this out. EDIT: Some faggots kinda ruin the video below
Awsome You should watch this aswell: http://www.youtube.com/watch?v=p5ImW1frmQQ Pre-written there are 4 different videos of them freestyling. You do know that even though people they say that they are freestyling it is usually pre-written stuff that they just remember.