The animation of Terry Gilliam -- OUAN403, Identify

Among all the jokes (including loads i wouldn't understand for years) what made a 12 year old me fall in love with Monty Python were the animated inserts. I particularly remember The Holy Grail as one of the first times I had seen animation mixed into live action - and there was also something special about the fact that it was quite clearly a film aimed at adults that contained what I had previously considered an artform meant for children. The lo-fi paper cutouts added another layer of wacky humour, helped move the story along, and I later understood that they were also a cost-saving device. The film, which is full of meta-jokes, probably most famously the final scene where a policeman breaks the fourth wall, also contains one of my favourite jokes; the animated heroes are being chased by a terrible monster, all hope is lost and the beast is about to pounce. Until the animator has a heart attack - saving their lives. This was almost certainly the first piece of animation I had seen which acknowledged itself as such, and explained, albeit in a humourous way, the relationship between animator and animation.