SEO and Nascar - Both about balance
If a racecar is too tight, it won't turn. If your SEO is too tight, you won't be able to change directions quickly either.
If a racecar is too loose, the back end comes out. If your SEO is too loose, you get a lot of tail action but don't lock in on the main terms.
If you get the best balance, your site takes first place and your racecar goes to the lead.
Funny how much of life is about balance, and it's funny I hadn't noticed the similarities before. Oh, and both require lots of attention to the details and fine tuning once you get to the track... er... web.