Like Poltergeist ^^^^^^^^
"They're heeeeeeeeerrrrreeeeee"
Here's a cool interview with Neal Casal.
Neal was the guitarist for Ryan Adams and the Cardinals and is now playing with the Chris Robinson Brotherhood.
He had the opportunity to play WOLF, Garcia's guitar.
Here's what he had to say. http://www.relix.com/features/2012/12/30/neal-casal-on-playing-garcia-s-wolf
Wow . . . now that is what I'm talking about jefe! Possibly the best LLR of all Dead time! Magnificent. If you don't get it with this one you just don't get it.
Towards the show’s end Pete got on-stage with the Dead and played three songs. Unlike most musicians who sit in, Townshend didn’t just stand to the side but got in the middle of the stage and jumped around
...
Pete said that sitting in with the Dead at Rockpalast was hard because he was having the chords shouted at him. He was also surprised at having trouble keeping up at some points because he thought the Dead never rehearsed