and listen to the anti-solo a 3:29 sec... u will hear an anti-solo of kurt cobain and it's horrible! because it's just a matter of improving a sort solo but using any single note on the guitar. Where u want and it can be (and it's the whole point of an anti solo) totally out of the pentatonic scales...just play random notes... it's ussually not really appreciate i guess in some kind of music..but in grunge or trash metal, it's just fine.
Hope i answered ur question, keep up =)
P.S: i just signed up here