First 15 seconds are great, and it follow with a great song.
The Beach Boys - Hang on to Your Ego - YouTube
One of my favorite intros:
http://www.youtube.com/watch?v=4AuxJH2Mj30
Killer thundering bass line opens the song:
whipping post - the allman brothers band - YouTube
Amazing introduction based on Bach's Toccata and Fugue in D minor. People who don't know The Band, you need to give this a listen.
The Band- Chest Fever (1968) - YouTube