MICHAEL PALIN??
From Wikipedia
In a scene near the end, The Yardbirds perform "Stroll On". Jimmy Page and Jeff Beck play side by side until Beck smashes his guitar copying The Who. Michael Palin of Monty Python's Flying Circus fame can be seen very briefly in the crowd in this scene,[citation needed] and future media personality Janet Street-Porter can be seen dancing in stripey trousers
Take a look
http://i34.tinypic.com/aynf2e.jpg
Im not sure, but he looks a lot like Palin share