I may of posted it here a few years ago, but I read Geoff's book while on vacation. A great read with some really insightful stories.
One that stuck out to me was when he was in NY working with John Lennon on one of his solo albums. Geoff and John are in the control room while Yoko is in the studio. I believe he described her vocal performance as "nonsensical caterwalling". At 1 point John looks over at Geoff with a weird, knowing look and they both just lost it. They fell to the floor laughing so that Yoko wouldn't see them, but she noticed. A little spat ensued and the session was over for the night.
See ya around Geoff.