The movement of the lips of them doing (trying to do) playback in the scene of the horses of Penny Lane is very comico (the sequence is backwards). But my fav is Let It Be clip: they are so serious, sad, distant and solemn. It is one of the first images of them that I remember. Paul looking at the camara and John playing very cool. The best moment comes when George playes the solo. I've always thought he played it perfectly.