Last night's UFC Fight Night 90 was only the first instalment of what is sure to be an action-packed weekend of Mixed Martial Arts action in Las Vegas.
But, while this Saturday's UFC 200 pay-per-view may is sure to include some phenomenal moments, nothing is likely to compare to the sheer willpower shown by Roy Nelson in his Heavyweight bout against Derrick Lewis last night.
That's because, in the closing stages of his match vs Lewis, Nelson somehow managed to withstand a ferocious shot from Lewis that connected as sweet as it possibly could. Scroll down to see Nelson and his iron chin stay on his feet.
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Although Nelson ultimately went on to lose his Fight Night 90 bout against Lewis, he wasn't going to let his opponent get the K.O. he was looking for.
I'm sure the majority of UFC fans will agree, Nelson - a fighter known for his ability to withstand onslaughts from his opponents - might be the only fighter in the promotion able to stay on his feet after taking such a brutal haymaker.
It looks even more brutal in slow motion, too.
And it's not as if Lewis' punches don't count for much. Behind his right hook is 260 pounds of heavyweight fighter.
Then again, the only man who has knocked out Nelson in the UFC octagon is Mark Hunt, the New Zealand heavyweight known as perhaps the hardest hitter in the entire sport.
Of course, credit should go to the New Orleans, Louisiana native too. Lewis won the first round, but battled back from losing the second round and several Nelson takedowns to outlast his strong-willed opponent.