From what I've seen freestyling isn't really freestyling at all. I mean in a general sense yes but most rappers who are really good continuously write lines and rhymes and build up a huge bank of lyrics they can draw from Eminem used to write shit down all day. So in the end yea your freestyling over a different beat but you really are reciting pre-made disses and jokes and lines and shit.
Dirtybag Dan and Mac Lethal....
Berz out.