> In counterpoint, a recent 60 Minutes piece on Paul MacCartney showed him playing an impromptu concert in his local pub. While playing one of his old hits – I can't recall which one – he suddenly started to stumble and couldn't remember the lyrics. Fortunately the audience was signing along and knew every word.
I'm sure that the 80-year old Paul McCartney deserves a free pass when he misses a line or two from an impromptu song.