As longstanding friends of Lennon, Voormann and Starr were disturbed by his emotional behaviour in the studio. In his 2004 book "Postcards from the Boys", Starr recalls that Lennon would burst out crying or start screaming midway through recording a track. Voormann said that Lennon would change from being upbeat to highly emotional and would discuss his feelings with Ono as they listened to playbacks in the studio control room. In Voormann's view, the effects of Lennon's therapy were especially confronting to Starr, since "The old John was gone; it was a different John. It wasn't the one he was used to."