The Pixies introduce new bassist at surprise Echo Park gig

Bands change. Bassists leave, to be replaced by others. As Spinal Tap can well attest, drummers vanish, overdose, spontaneously combust. After the genius Who percussionist Keith Moon died, former Faces drummer Kenney Jones, no slouch, tried to fill in. The Rolling Stones haven't toured with Bill Wyman in ages. Dude from Sublime died, but Sublime (with Rome) still tours. The Doors went on the road with Ian Astbury of the Cult as their lead singer, for heaven's sake.