Yair Rodriguez vs. Chan Sung Jung was already a Fight of the Year candidate. Then, with one second left on the clock, it became a Knockout of the Year candidate too.

In one of the most stunning moments in UFC history, Rodriguez pulled off an all-time great comeback by knocking out “The Korean Zombie” with a backward upward elbow at 4:59 of the fifth round in the thrilling main event of UFC Denver. At the time of Rodriguez’s knockout, Jung was up on two of the three judges’ scorecards and was literally one second away from winning the fight.

Check out how the pros reacted to one of the most unreal sequences in recent mixed martial arts history below, plus the best of the rest from an action-packed night at UFC Denver.

YAIR RODRIGUEZ DEF. CHAN SUNG JUNG

I’m literally in jaw dropping aww right now. Wow!! I was about to say this fight had a @ForrestGriffin vs @StephanBonnar feel to it until that incredible finish before the bell! Wow!! @ufc — Alan Jouban (@AlanJouban) November 11, 2018

Flash Knockout!!! Classic Elbow, Nice Work. Get That Cardio Right Hombre @panteraufc -Champ — Tony Ferguson (@TonyFergusonXT) November 11, 2018

Well fuck me running. That perfect upward elbow KO by Yair at the buzzer in the main event on the @UFC 25 year anniversary card is what this sport is all about! You can’t script this type of stuff, this is why we love this sport, this is what the UFC is all about. #UFCDenver — Michael Chiesa (@MikeMav22) November 11, 2018

I honesty think that’s the most insane thing I’ve ever seen in modern MMA. We’ve had giant women fight grandmas, 600 lbs men get their balls pounded but that was on another level. — “Filthy” Tom Lawlor (@FilthyTomLawlor) November 11, 2018

Just think the UFC cut him recently for not being a good old boy.

That’s shit was freaking awesome! https://t.co/Pmkiqiui87 — Seth Baczynski (@Sethbmma) November 11, 2018

Holy smokes @panteraufc ! What a technique! — Daniel Cormier (@dc_mma) November 11, 2018

WTF did I just witness woooooow what a finish #ufcdenver — KAMARU USMAN (@USMAN84kg) November 11, 2018

That was a crazy fight and a spectacular finish!!! Congratulations @panteraufc !!!! #UFCDenver — Jessica Penne (@JessicaPenne) November 11, 2018

Holy.shit. What just happened?!? — Brad Tavares (@BradTavares) November 11, 2018

Now that is the craziest win I've seen in a thousand fights. #UFCDenver — Patrick Williams (@IAMTHEANIMAL) November 11, 2018

That was fuckin insane! Gotta give @panteraufc his props for that.. i can’t believe what i just saw #UFC25years — Shane Burgos (@HurricaneShaneB) November 11, 2018

What did i just witness? Elbow from down under #UFCDenver — Tatiana Suarez (@TSPMMA115) November 11, 2018

Greatest walk off KO ever — Ian McCall (@Unclecreepymma) November 11, 2018

I can’t believe that...Fuck I love mma!! #UFCDenver — Alex Volkanovski (@alexvolkanovski) November 11, 2018

What did I just see? What a MAIN EVENT fight and finish! #UFCDenver #UFC25years @ufc — Marion Reneau (@BelizeanBruiser) November 11, 2018

Great Fight @KoreanZombieMMA Good Main Event For @ufc — Tony Ferguson (@TonyFergusonXT) November 11, 2018

I’ve seen @TonyFergusonXT throw that same elbow in training and thought “good luck with landing that!” well... ok.. — Alan Jouban (@AlanJouban) November 11, 2018

#UFCDenver main event was always impressive to watch two guys who fight till the end regardless of the score cards. — Damien Brown (@beatdown155) November 11, 2018

That was the craziest finish I’ve seen. Mostly with having just 1 second left, and being down on the score cards #UFCDenver — Jeremy Kennedy (@JeremyKennedyWC) November 11, 2018

Yair with one second left on the Korean Zombie. #ufcdenver pic.twitter.com/YX7wFhUOFK — The Mane Event™ (@EliasTheodorou) November 11, 2018

Everything happens at least once. Probably won’t see this again #ufcdenver welcome back @panteraufc https://t.co/atV3BtX5H5 — Damien Brown (@beatdown155) November 11, 2018

DONALD CERRONE DEF. MIKE PERRY

Good Work @Cowboycerrone Great Composure & Solid Submission -Champ Shit Only Congrats — Tony Ferguson (@TonyFergusonXT) November 11, 2018

At this moment I knew a tap was coming #UFCDenver pic.twitter.com/CUmOyZmBCQ — Tatiana Suarez (@TSPMMA115) November 11, 2018

Pure goosebumps. If you didn’t love him before. You better live him now. Everybody has to be a @Cowboycerrone fan. https://t.co/W1TzsGBc9n — Tim Kennedy (@TimKennedyMMA) November 11, 2018

Identified he was set up on the wrong side and switched his feet and shifted his hips away from the cage. Beautiful arm bar from Cerrone. #UFCDENVER #UFC25years — Louis Smolka (@LASTSAMURAIUFC) November 11, 2018

@Cowboycerrone the sick c*nt!! That’s the ultimate praise in Australia, In case you Americans didn’t get the memo. — Alex Volkanovski (@alexvolkanovski) November 11, 2018

MONSTER ENERGY DRINK:

ITS GOT WHAT BABIES CRAVE! #UFCDenver pic.twitter.com/GMx52lioVJ — Angela Hill (@AngieOverkill) November 11, 2018

Hahahaha @PlatinumPerry just got submitted by a lightweight jobber!! Back to the Indian Casinos Junior! You ain't ready for prime time!! #ufcdenver #ufc25years #BringBackHorseFace — Colby Covington (@ColbyCovMMA) November 11, 2018

Fucking cerrone I’m going to go to madam cerrone to lift this flyweight curse #holes — Jarred Brooks (@The_monkeygod) November 11, 2018

DONALD COWBOY CERRONE!!!!!!!!! What a fucking stud. People don’t realize he is one of the most well rounded guys in the game. That’s why he has the all time finish record in the UFC. He ain’t no one trick pony, congrats @Cowboycerrone #ufcdenver — Michael Chiesa (@MikeMav22) November 11, 2018

So happy Donald "Cowboy" Cerrone won that fight! — Bobby Nash (@B_Nashty) November 11, 2018

Hats off to @Cowboycerrone — Dennis Bermudez (@MenaceBermudez) November 11, 2018

Great win and celebration for Cerrone. Super cool to bring his son in the cage like that!! — James Vick (@JamesVickMMA) November 11, 2018

— Derek Brunson (@DerekBrunson) November 11, 2018

Congrats @Cowboycerrone on your performance and having the most wins/finishes in UFC history. P.s your son is so cute. It was so nice to hear that he inspired you to go out there and leave victorious. #UFCDENVER — Tatiana Suarez (@TSPMMA115) November 11, 2018

Good job @Cowboycerrone you broke my damn arm — Platinum Mike Perry (@PlatinumPerry) November 11, 2018

GERMAINE DE RANDAMIE DEF. RAQUEL PENNINGTON

Pennington looks like she does not want to be in there #ufcdenvee — Katlyn Chookagian (@blondefighter) November 11, 2018

BENEIL DARIUSH DEF. THIAGO MOISES

Flawless performance by @beneildariush congrats brother — Rafael dos Anjos (@RdosAnjosMMA) November 11, 2018

Dariush is going to get his first victory in over two years!!! #UFCDenver pic.twitter.com/HK3ErOXVdi — The Mane Event™ (@EliasTheodorou) November 11, 2018

MAYCEE BARBER DEF. HANNAH CIFERS

Barber is legit #UFC25Years — Cub Swanson (@CubSwanson) November 11, 2018

Barber gets the stoppage in a rain of blood and elbows. #UFCDenver pic.twitter.com/1YhuwPdQON — The Mane Event™ (@EliasTheodorou) November 11, 2018

That right there is why you gotta be careful about going for leg locks in mma when there's punches involved — James Vick (@JamesVickMMA) November 11, 2018

Wow what a debut by @MayceeBarber — Bec Rawlings (@RowdyBec) November 11, 2018

Yes, after i retire — Tatiana Suarez (@TSPMMA115) November 11, 2018

Did this lil chick just fight? Damn not a scratch #UFCDenver — KAMARU USMAN (@USMAN84kg) November 11, 2018

MIKE TRIZANO DEF. LUIS PENA

Thought that was a great little scrap between Pena and Trizano. Think I'm leaning Trizano, but who knows with judges these days. #UFCDenver pic.twitter.com/04ARwivGRq — The Mane Event™ (@EliasTheodorou) November 11, 2018

You see all those punches to the head? Well they’re happy little headshakes now. We’ll just make em happy little headshakes #UFCDenver — Angela Hill (@AngieOverkill) November 11, 2018

So proud of my brother @TheLoneWolfMMA!! Awesome performance.. Way to represent @TigerSchulmanns!#UFC25years — Shane Burgos (@HurricaneShaneB) November 11, 2018

After winning The Ultimate Fighter, it’s crucial to win that first fight in the UFC. Congrats @TheLoneWolfMMA #UFCDENVER #UFC25Years — Michael Chiesa (@MikeMav22) November 11, 2018

Too many happy accidents for Pena i guess ‍♂️ #UFC25Years — Cub Swanson (@CubSwanson) November 11, 2018