well the thing is once you have written enough shit and used it in other freestyles or practcied it just in your head or whatever you get a whole lot of little segments ya know.....foir like a 30 second battle, mabye think of a quickie about the guys name in your head your battling...throw a couple segments one or 2 of the hudnreds you have filling your head..with the filler between them being freestyle....thats what i figure most people do...although mabye they rehearse a whole verse i guess it depends who does it..im sure some people do do it all off the top of the dome but it dont sound as nice or hit as hard...