It was a liver shot for sure. Might have broken some ribs as well
Hit him right in the liver and the floating ribs.
Liver shots will drop even the toughest fighters to the ground.
It was a shot to the ribs, according to all the post fight analysts, including Kenny Florian and all the Fox analysts. You can clearly see the kick go directly into his ribs here:
http://www.bloodyelbow.com/2014/12/...chida-vs-dollaway-full-fight-video-highlights
"The former light heavyweight champ destroyed C.B. Dollaway with a first-round TKO stemming from a massive kick to the ribs."
http://mmajunkie.com/2014/12/ufc-fight-night-58-lyoto-machida-vs-c-b-dollaway-fight-video-highlights
"That rib-crushing knockout of C.B. Dollaway makes Lyoto Machida 2-0 against Arizona’s Power MMA Team.
Wouldn't surprise me if Dollaway has a broken rib or two."
http://www.sherdog.com/news/articles/Rapid-Reaction-UFC-Fight-Night-Machida-vs-Dollaway-79029
Going by what the experts said, and what I saw.