93 Sqn Linebook No. 2 - Page 26 - The top caption says "Zoom! Screech! - reference to a Paddy Minnis game which could lead to a lot of consumption!.   It also says - "teaches the art of complete relaxation, the practice of which will restore and build up nervous energy resulting in a high standard of happiness".   The bottom caption from Birdie Biggs with Eric Pigdon in the background at Eric's farewell party says "Owooow! The C.G. is a bit aft but I like them unstable."   (Thanks to RAF Museum.)