John travels to South America with TMV and joins them onstage during Drunkship of Lanterns.

John joined The Mars Volta onstage for Take The Veil Cerpin Taxt.

John joined The Mars Volta onstage for Take The Veil Cerpin Taxt.

PJ Harvey and John joined Vincent Gallo and his band (Jim O'Rourke and Steve Shelley) onstage for a, said by many, gorgeous performance of Moon River. Otherwise, this was a rare occasion where Gallo performed his entire 2001 album "When" and a separate single.

Vincent Gallo played at the ATP Festival night curated by Sonic Youth and John & Josh were his backing band. The entire performance was an improvisation with no prior rehearsal.

After he opened for the band with one of his experimental performances, John joined Blonde Redhead onstage at some point.

During their benefit performance to raise funds for the John joins Pearl Jam onstage as the third guitarist for covers of two Ramones' songs - Daytime Dilemma and I Believe in Miracles; and then for the six-guitar showe closer, a cover of Byrds' So You Wanna Be a Rock'n'Roll Star.

The first out of quite a few times John would join his afro prog-rock friends onstage, this time for the encore song, Cicatriz ESP.

John joined the short-lived dub band that existed before The Mars Volta and after At the Drive-In for a long improv based on their song Cordova.

New Order opened for the RHCP at their biggest gig before Slane and John joined them on stage for a cover of Joy Division's Transmission.