I would figure it difficult for anyone over 10 to have not heard Tom Sawyer at some point in their lives.
Before Michelle comes in here raving about Rush's instrumentals, I would like to repost this for anyone who didn't see in the prog thread as irrefutable proof of why no one should give a shit:
[youtube=425,350]Lcg_j8Mdmdw[/youtube]
King Crimson - Larks' Tongues In Aspic, Part II