Scroll through. Watch what Bob is doing during the intro. In my experience, musicians, including Bob, are not fiddling during the intros. More focusing. http://alanhessphotography.com/that-time-i-photographed-donald-trump/ Loved the Mark and Robin shots.
"Trump walked out on the stage to a pretty stunned crowd and made some remarks about how Bob and the Grateful Dead had sold out Madison Square Garden some random number of times. Then he told the crowd he would be taking Bobs place during the show tonight. That went over like a lead balloon. Trump walked off the estate to a mixture of boos, cheers and mostly just stunned fans staring at him." Based on how he carries himself now I picture that went diffidently in his mind. Like he genuinely believed saying that would get him applause because who would not applaud me.