Fabricio Werdum: No one saw it, but Mark Hunt verbally submitted after I knocked him down at UFC 180

No one, including the referee.

That's according to Ultimate Fighting Championship (UFC) interim heavyweight titleholder Fabricio Werdum, who popped and dropped Mark Hunt with a flying knee to end their UFC 180 pay-per-view (PPV) main event in Mexico City (video replay here).

But it would have been over sooner, had the man in black heard the "Super Samoan" surrender (via Bloody Elbow):

"We went to the ground but he was very clever. He is very smart when he fights. He blocked my guard game in the cage. When we stood up, I tried twice to take him down and he defended very well. I trained a lot for this, I asked my master Rafael Cordeiro and he allowed me to use my double leg as a set up. Hunt knew that I would try to take him down, it was obvious. So I did the set up downstairs and then I hit him with a knee in his chin. It was hard because he is very intelligent, he knows how to move at the octagon and he's smart. I was able to hit him with the knee and after that happened a thing that no one saw was that he asked the referee for the end of the bout. When he was knocked down he said that it was enough and the referee didn't listen, so I had to hit him a few times more."

The official ruling was second-round technical knockout.

That came as a surprise to many fans and pundits, who expected Werdum to win their five-round contest by way of submission -- if he was going to win at all. Early in the fight, Hunt appeared to have "Vai Cavalo" all figured out, then BANG and it was all she wrote.

Just ask him, he'll tell you.