Cofty,
So... this is how I understand it:
It's like dropping a drop of water into a sphere that has a "smooth" section... i.e. infinitely many possible paths, at first... but then there is a section where the paths are well-defined and it MUST go through that evolutionary path?
I guess it shows that natural selection is anything BUT random. Randomness could NOT have accounted for the same changes in the same genes... the odds are just too low!