What a performer. Everyone who's going around now doing half-baked music-as-performance-art stuff should watch this to see how it ought to be done.
By which I mean how music-as-performance-art should be done, not how half-baked etc.
Watching it again, it struck me that if Cage had been English he might have been a comedian instead of a composer... this isn't intended as a slight on Cage, or comedians, or composers, or the English, or Americans (is that enough?), or indeed as a fully-formed thought, it just drifted into my head (especially reading tonybob's reference to Tommy Cooper).