When John Paul Jones was miffed by fellow Zep members

Twenty years ago, Led Zeppelin singer Robert Plant and guitarist Jimmy Page reunited for an MTV live concert dubbed "Unledded."

The other surviving member of Led Zeppelin, John Paul Jones, was not informed of the reunion.

Jones was reportedly miffed by the snub, especially when music from the show was released on an album titled "No Quarter" after the Led Zeppelin song designed to showcase his piano playing.​