Superb moment
Rowan has just blown the cable car to kingdom come with his umbrella. Rosamund and Gillian are watching from a distance.
Rosamund says simply "Oh, Johnnie"; her intonation and expression is just right, her hair blowing slightly in the breeze, framing that supremely perfect face. Rosamund is an angel of course, but at that moment a very, very human angel.
Not just the three seconds of perfection that makes the film, it is just about the hottest G-rated three seconds in all of cinematic history. I could watch it one thousand times.