There are some cool talk show interviews out there where he talks about songwriting, and the process. Old school low key Dick Cavett stands out, they don't make talk shows like that anymore.
One interview (Letterman show) he talks about the incident at the NY Central Park show where a nutcase fan rushes him on stage, right as he's singing the lines from the song The Late Great Johnny Ace about hearing of John Lennon's death. He plays the song on the show, Letterman. As he is singing/playing the song (not his guitar, a Martin D35 maybe?) his 1st string high E gets hung up on a fret edge. Contrary to myth it's not the exact moment in the song where the fan had rushed him on stage at the Central Park show, but still a little odd. After commercial break he completed the song. A touching song.
Man, a lot of those guys are getting old. Pray they die natural deaths, unlike Lennon, JFK, the late great Johnny Ace.