Today, it's all about the knockouts, and these are 25 of them for you to go over and relive or see for the first time in all of their glory.
Everything from headkicks, spinning-back fists, elbows and slams make up the best of MMA, and they all end with the same result—someone getting knocked out. The winners would not want it any other way.
Everyone from Anderson Silva to Quinton "Rampage" Jackson and Melvin Manhoef is featured, and there is no shortage of brutality when it comes to them and many others are seen putting someone to sleep.
These are the 25 best knockout videos on YouTube.
It's not the first, and it's not the last, but in a fight between King of the Cage veterans Aaron Wetherspoon and Anthony Lapsley, a double knockout was the only thing that ended the fight.
The commentator got it right when he said "that's something you see out of a movie, man."
The only thing that makes this double knockout stand out from the rest is referee Herb Dean's reaction.
The two fighters had a rematch three months later where Lapsley won by a scarf-hold armlock.
After 50 bouts and never getting his chance in the UFC, Brian Ebersole decided enough is enough and knocked out Shannon Forrester with a cartwheel kick in the first round of the fight.
The MMA veteran found himself fighting in the UFC less than two years later.
Former UFC welterweight title challenge Hayato "Mach" Sakurai made a career fighting in the biggest MMA promotions, including Dream, Pride and the UFC, and his exciting style made him a fan-favorite.
In this 2006 fight with the Japanese star, Olaf Alfonso hoped to make a successful return to action after being brutally knocked out by Rob McCullough in his previous fight.
Sakurai put all of those intentions on hold after landing a devastating right hand.
All it took was three seconds for IFL and Ringside MMA veteran Chris Clements to knock out Lautaro Tucas in a 2006 bout.
Tucas was making his MMA debut when he got caught flying through the air before the bell had even stopped ringing.
With this being his only professional bout, Tucas can make the case for having the shortest fighting career of all time.
Russian MMA fighter Arthur Guseinov was coming off two back-to-back submission losses when he took on Tyson Jeffries on an M-1 Challenge card earlier this year.
He made quick work of his opponent after landing one of the most spectacular spinning-back fists you will ever see.
UFC heavyweight prospect Dave "Pee Wee" Herman has 20 stoppage victories in his 23 career fights, including this unusual one vs. Jim York.
While defending a leglock attempt by his opponent, Herman started to unload axe kicks from his back. It didn't take too many before his opponent was knocked out.
Bellator featherweight champion Joe Warren moved down in weight to fight in the promotion's bantamweight tournament, and it would be Cuban fighter Alexis Vila who would welcome him into the division.
It would not be as easy as Warren would have liked, and he got blown away by a left hook a minute into the fight.
Dream welterweight champion Marius Zaromskis didn't put his title on the line for his fight with Ho Bae Myeong, but he approached it like he did his previous two, which he both won by head kicks.
Nineteen seconds is all it took before Zaromskis landed it again, and he got another highlight-reel KO for his effort.
One week after Toby Imad's submission of the year was seen, Mexican MMA fighter Yahir Reyes had produced the knockout of the year when he dropped Estevan Payan in the second round with a brutal spinning-back fist.
This finish is one of the many reasons why Bellator is so exciting to watch, and it's not unusual to see finishes like these in every one of their shows.
There are many ways to avoid a submission attempt, and slamming your opponent on their face is one of them.
Quinton Jackson would be proud of this one.
Marcus "Lelo" Aurelio specializes in Capoeira, and he put those skills on display in this 2011 fight with Jose Cornejo.
Cornejo appeared to think it was all just flash until he got kicked in the face and put to sleep just 43 seconds into the fight.
It might not be "the most incredible victory in the history of mixed martial arts" as commentator Gus Johnson alluded to, but it's still fun to watch.
After accepting the fight on hours' notice, Seth Petruzelli made the most of his opportunity and knocked out Kimbo Slice 15 seconds into their fight on CBS.
In a year that has seen more front kicks to the face than ever before, Justin Buchholz added his name to the list when he delivered one to Steve Lopez at Superior Cage Combat 1.
Out of the three this year, this might be the most brutal of them all.
It was just another day at the office for Shannon "The Cannon" Ritch when he took on John Wood for the second time at a 2008 Shark Fights event.
In a career of more than a hundred bouts that dates back to 1998, this might go down as the most memorable moment for the 41-year-old.
In the Dream Middleweight Grand Prix Final, Gegard Mousasi faced Ronaldo "Jacare" Souza in an anticipated matchup of intriguing styles.
Not only would the GP champion be crowned, the Dream middleweight champion would be crowned as well.
Mousasi won both after knocking Souza out with an up-kick in the first round.
Mark Hunt might go down for having one of the best chins ever, but his knockout loss to Melvin Manhoef will stand out in his career because of how shocking it was.
Then again, what else would you expect from a guy who has 23 knockouts in 24 victories?
After being released from the UFC, Akihiro Gono hoped to rebound from his two losses with a victory over Dan Hornbuckle at Sengoku 9.
Those wishes were put to rest after Hornbuckle landed a head-kick in the third round to put Gono down and out.
Cage Rage veteran Sami Berik is 14-34 in MMA, but his victories were sometimes impressive, including this one vs. Mark Smith.
After knocking his opponent out, Berik showed a lot of sportsmanship in not throwing another punch. With what happened afterwards, he's probably glad he didn't.
Melvin Manhoef might be one of the scariest fighters in MMA, and his knockout victory over Kazushi Sakuraba puts that notion into perspective.
The K-1 kickboxer knocked out the Japanese legend in the very first round after landing some devastating hammer-fists on the ground.
It's nothing flashy. It's just straight up brutal.
Melvin Manhoef got a taste of his own medicine in his Strikeforce debut vs. hard-punching Robbie Lawler.
After dominating the early portion of the fight with leg kicks, Manhoef appeared to be on his way to a stoppage victory.
That was before Lawler landed his right hand.
Paul Daley had one of 2010's best knockouts when he put Scott "Hands of Steel" Smith to sleep in the very first round.
There would be no comeback victory for Smith in this fight. It was all "Semtex."
Before Anderson Silva was ever UFC middleweight champion, he made his career fighting in Pride and Cage Rage.
In his first bout before moving to the UFC, he knocked out Tony Fryklund with an elbow to defend his Cage Rage World Middleweight Championship.
There isn't much to say about Quinton "Rampage" Jackson's slam knockout over Ricardo Arona.
It might be the most famous knockout of them all, and it's also one of the scariest.
"Hit him first, and hit him hard" is a quote often used to describe a fighter's approach to the start of the fight, and it can be quite intimidating.
Japanese superstar Norifumi "Kid" Yamamoto set a record in his 2007 K-1 Heroes fight when he knocked out Kazuyuki Miyata just four seconds into their fight.
"You gotta see it to believe it."
By this point, the double knockout between Shaun Parker and Tyler Bryan is legendary, and if you still don't believe it, well here it is again.
It has got to be tough for Parker, who was making his MMA debut in this fight. There is nothing he can do to top this.