The Hole (1962)

No wonder construction projects all take such a long time! This short animation sees two labourers - voiced, unscripted, by Dizzy Gillespie and George Matthews getting on, leisurely, with their subterranean industry whilst chewing the fat about just everything from politics to the threat of impending nuclear war. Meantime, the creatively inspired animators give a natural and engaging impression of trying to keep pace with their ramblings, offering us some quite sophisticated visual accompaniment at times. The pace of the drawing and of the chattering is pretty continuous and you just know that something momentous is going to finish their day off. It's maybe just a little too long, but the two gents manage demonstrate enough of a friendly, pub-style, conversation to keep it interesting.