I've been watching a lot more of the Dr. House show, and becoming a bit obsessed with some SEO mysteries of my own. Since our last outing into diagnosis went so well, I thought we'd try again. I haven't got either completely solved, but I feel pretty good about some hypotheses. Let's see how you do:

Mystery #1: Google SERPs for Web Crawler

Ranking in position #8 is the real estate site "www.mckinley.com" with neither the word "web" nor "crawler" on the page or in the URL. Why is it there?

Mystery #2: Google SERPs for 4:20

Don't ask me why I was searching for it, but that 7th result is peculiar. What causes it to rank at Google, but not Live or Yahoo?

Looking forward to your analyses in the comments, and yes, if SEO were a class, this would be extra credit. :-)