Bud Powell backstage, Paris, 1959. Astonishing photograph. Jon Mayer posted this, sent to him by a fan who’d snapped the pic a half century before. Bud and Mayer shared the bill, Bud doing a set, then Jon, then Bud, then Jon. Now one of LA’s best jazz pianists, Jon Mayer was a young kid in from NYC and on top of his game, ideas coming at the speed of light, fingers flying. Bud Powell was good then too, but epileptic and post-electroshock therapy. He probably looked out on a world in two dimensions that never quite connected, un poco loco, wondering how much he had forgotten.