They stretched out considerably on "Rats in the Cellar" (from 1976′s Rocks), jamming at the song's end. They're tight enough players that they could grow out their songs to Zeppelin-like lengths in concert if they chose to do so. "That's what this band is all about!" Steven Tyler hollered after the song.

Another thing the band is about: Tyler's ageless charisma. While the band jams on their instruments, he plays the audience with a skill unmatched by anyone in rock music. He gained a few extra cheers during "Livin' on the Edge," when he wandered to the VIP section and shared the mic with his daughter, Liv (standing with her Leftovers co-star Justin Theroux). But he rarely stayed still throughout the show, save for his piano playing during "Dream On."

Another thing that the band is all about is the camaraderie between Tyler and Joe Perry. There's a perception that the two hate each other (helped by Tyler's now-infamous "Yeah, I'm that good" comment on an interview with "60 Minutes"). Well, if that's true, they kept the drama off the stage. Unlike, Mick Jagger and Keith Richards, who generally don't interact too much onstage at Rolling Stones shows, Tyler and Perry share the mic often, with Tyler draping himself over the guitarist often throughout the show. He did the same, but less often, with bassist Tom Hamilton and guitarist Brad Whitford.