I was watching Greg play this game on ICC two nights ago (vs. Molton) and I was thinking "man, Greg is in trouble after Nf5." After thinking for a full minute, white plays 20. Nf5, but then Greg just takes it and the guy resigns. I laughed for a long time.
(20...gxf5 0-1 because 21. Bxf5 Bg6 and the white bishop is pinned to the queen. Black can also throw in 21...Rxe1 first, since he'll need to after white's bishop takes on d7)