LA Times Review: John Mayer hops aboard the Dead & Company train at the Forum

The members of Dead & Company had been chewing on the taut boogie-rock groove of “Bertha” for a good long while at the Forum when John Mayer looked over at Bob Weir in search of a little guidance.

Are we done? Mayer seemed to be asking with his eyes. Or do we keep going? Weir took his hands off his guitar and made a quick rolling motion.

They kept going.