A friend attended this show (a Dylan fan, naturally) and said that, at one point, Dylan nodded to mark to play a solo and then played some piano that drowned out almost everything else including Mark's solo. I don't listen to these concert recordings but you might listen out for that.
Also at this show, Dylan predicted Obama would win. I'm not sure what prompted him to commment at all but this may be instructive. As in 2008, Tony Garnier was wearing his Obama button (that is, "badge" to we Brits) and my friend tossed another on to the stage. Tony picked it up, looked at it, grinned and handed it to Bob.