I know Stanford has a great swim team and many, many Googlers come from Stanford but these Google directions results prove a couple of things. First, mapping directions is a very difficult task for computers and algorithms. Second, the folks at Google have a sense of humor. Note direction number 20.
I love the estimated travel time of 29 days.
For good measure I did the same query on Live and Yahoo and neither delivered a result, though I wonder why since Yahoo uses the same deCarta DDS technology as Google. That leads me to believe it is indeed that crazy bunch in Mountain View having a bit of fun with us.