Memorable and awe-inspiring to my 15-year old self.
Village Corner, Toronto, mid-'Sixties.
Paul Clayton, may he rest in peace, drove up to the gig in a little sports car with Mississippi plates. During intermission, he came out to find the tires slashed (probably by someone who thought they were making a civil rights statement).
Proceeded to sing "Sam Hall."
At the point in the song where the lyric is "Goddamm your eyes, you muckers all" (if I remember it correctly) he violently rips a string off the guitar. And continues to rip another string off after each line
until the bridge was torn off and pieces of the top lay at the audience's feet.
Then he actually said it was a borrowed guitar and walked off stage.

Gotta travel on . . .

Lash LaRue