Check out the clip, "Banksy Simpsons Intro". More about Banksy, do check the official website here http://www.banksy.co.uk/.
He also has an entry in Wikipedia, "Banksy" and take a look--partially quoted from Wikipedia: "Banksy is the pseudonym of a British graffiti artist, political activist and painter, whose identity is unconfirmed. His satirical street art and subversive epigrams combine irreverent dark humour with graffiti done in a distinctive stencilling technique."
He's that talented, alright.
