Best Performance of the Century

[Sightseek]

Being only the beginning of 2007 this is very premature...

To me Greatness is defined by more than raw talent streaking to the wire through very few starts...it's doing what is now becoming unimaginable...winning season after season, at different distances and tracks, carrying weight and still leaving your classy opponents in the dust.

So thou shalt not use the word Great, but what single performance was jaw dropping, scintillating and awe worthy in our current Century?