The envelope please ... http://www.mma-manifesto.com/2009-articles/december/2009-mma-manifesto-knockout-of-the-year.html
Henderson-Bisping was a real close second for me. I got turned off by Henderson pounding him while on the canvas even though he knew he was already knocked out. But Machida's won out because of the way Evans crumpled, the fact that Evans had never been knocked out before and because it was an important match - for the title.
As impressive as Hendo's was... how about them apples? [video=youtube;l6oiADjOdFg]http://www.youtube.com/watch?v=l6oiADjOdFg[/video]