Seven-minute funk blues worked up from concert jam
Song was first sign their reunion would stick: 'Oh my God, we're back!'
Bassist wrote lyrics for the first time on new track
Band talk about first album of original material in 11 years
Band talk about first album of original material in 11 years
Rockers talk about first album of original material in 11 years
Propulsive rocker comes from band's new album, due this fall
Plus, Steven Tyler looks back on 'American Idol': 'I loved it and hated it'
'It’s the kind of thing where it represents who you are'
