Mixed martial arts is the most unpredictable sport in the world.
There are hundreds of ways a fight can end with stoppages coming at any time, often in dramatic fashion.
Whether for fear, excitement or utter disbelief, sometimes you just cannot contain the emotion accompanies a furious finish inside the Octagon.
To honor these times where you were forced to jump out of your seat and go bat-s*** crazy, I present to you the top 10 Oh S*@! moments in MMA history.
Get your popcorn ready and start the slideshow. This is going to be fun.
You may not remember now, but Japanese bantamweight Takeya Mizugaki was once one of the world's finest bantamweights.
After unsuccessfully challenging for then-champion Miguel Torres' WEC belt, Mizugaki began a run back up the ladder in hopes of a second chance at gold.
This run led him to Urijah Faber, a man who seems to always be involved in his division's title picture.
Many felt that a win over Faber would put Mizugaki back in contention, but "The California Kid" had other plans.
After locking in a deep rear-naked choke, Mizugaki went to sleep. Unfortunately, the choke was set up at a strange angle against the cage, and referee Josh Rosenthal halted the action too late, to say the least.
After Faber released the choke and stood up, viewers were left with a stiff and unconscious Mizugaki laying on the canvas.
Despite knowing that a rear-naked choke is not typically a life-threatening move, I think I speak for all of us when I say this was a serious "Oh S!" moment in MMA history.
For those wanting some resolution that did not catch the fight, yes, Mizugaki was fine.
It seems crazy to say now, but the head kick was once a never-utilized technique inside the UFC Octagon.
That changed at UFC 17.
Pete Williams caught former UFC heavyweight champion Mark Coleman square in the face with a high kick, and to the canvas "The Hammer" went.
It was a great knockout regardless, but when you add in the fact that it was the first head kick knockout in UFC history, it becomes that much more worthy of a big ole "Oh S&#!."
At UFC 144, Yushin Okami mopped the floor with Tim Boetsch for a full two rounds.
In the third, Boetsch's corner told him he had to finish the fight, and finish the fight he did.
After rocking Okami early in the frame, Boetsch found himself against the cage with the Japanese star, throwing crazy sideways uppercuts from hell.
These worked, and Okami fell to the canvas a defeated man.
I clearly remember watching this fight in a bar as I ate my wings and downed some brew. But when this series of events unfolded, the entire bar stopped to watch and chant, in unison, "Oh S&#!."
There wasn't a person on this earth that saw Edson Barboza's spinning wheel kick knockout of Terry Etim and didn't say "Oh S&#!."
Seriously. I watched this fight with my one-year-old nephew, and those marked his first words.
My dog even barked the phrase as it happened. It was that ridiculous and just another reason why we love the sport.
Nobody expected Matt Serra to defeat welterweight phenom Georges St. Pierre at UFC 69, but the MMA gods do not really care about our expectations, now, do they?
Serra caught GSP with a vicious punch that put the champion on wobbly legs, and the book was written from there.
In one of the biggest upsets in UFC history, Matt Serra became the welterweight champion of the world, and the knockout was cause for commotion.
My ears are still ringing from the chants of "Oh S&@!" that erupted as Serra landed punch after punch to the grounded Canadian.
If watching the staredown between Clay Guida and Diego Sanchez didn't get your blood pumping, check your pulse, dude.
As the two lightweight standouts took the center of the Octagon at The Ultimate Fighter 9 Finale to touch gloves, a black cloud of chaos filled the Octagon, and you just knew it was about to go down.
After absolutely no feeling out process, the two stood toe-to-toe against the cage and wailed haymakers at each other for what seemed like an eternity.
Eventually, the pace would slow (by their standards, at least), but the first two minutes of that fight remains one of the most exciting moments in MMA history.
From the staredown right to the opening bell right through the first round, one could only think, "OH S&#!" this is good!
When longtime fan favorite Randy Couture made his return to the UFC Octagon against heavyweight champion Tim Sylvia at UFC 68, few fans gave the recently retired Couture any chance at winning.
Those that did see Couture winning, though, saw him riding to victory through his wrestling, dirty boxing and top control—all signature elements of his game.
So when Couture floored Sylvia with a huge right hand just seven seconds into the first round, you can understand the world's excitement and disbelief.
Never thought to be a great striker, Couture caught the much larger Sylvia square on the jaw, and the 6'8" behemoth went crashing to the canvas.
If you look closely on the replay, you can actually see Sylvia saying "Oh S&@!" right before the punch lands.
Outside of the cage, Quinton Jackson seems to be a funny, easy going guy.
Once the lights go down and "Rampage" comes out though, look out, because things are about to get brutal.
No moment in Rampage's career epitomizes this quite like his insane slam of Ricardo Arona at Pride Critical Countdown 2004.
As Arona looked to lock up a triangle choke on Rampage, the current UFC star lifted with all his might and immediately brought the weight of the world down on his foe, ending the bout in a ferocious knockout.
Watching the event unfold, there is really only one phrase worthy of summarization: "Oh S&#!"
Take a good look at Cheick Kongo's legs in the above picture.
That, my friends, is not how a fully conscious man stands.
After eating some heavy leather from UFC heavyweight striking sensation Pat Barry at UFC Live: Kongo vs. Barry, the French kickboxer looked down and out—on multiple occasions.
After being rocked several times in the fight's opening frame, many, this writer included, saw an imminent victory for Barry. We were all just waiting on how exactly he was going to finish his wounded foe.
That all changed when Kongo unleashed a hybrid uppercut/straight right straight out of Hades that floored his opponent for good.
Barry was out cold and viewers were left jaws open in the aftermath of what remains my favorite comeback of all time.
Honestly, I could not even say "Oh S&#!" to this one; I was speechless.
After Pete Williams showed the world what a head kick could do, some fighters could not resist taking the technique to the next level.
The move's most famous practitioner, Mirko Cro Cop, forged a legacy of brutal knockouts through the technique. He remains to this day one of the best kickers the sport has ever seen.
When the Croatian striker took on Brazilian jiu-jitsu specialist Gabriel Gonzaga at UFC 70, many expected another highlight reel head kick knockout.
Well, we got one...But it was Gonzaga doing the kicking.
They say that one knows a moment is truly huge when you can remember exactly where you were and who you were with at its time of occurrence.
I was on my cousin's couch drinking a Diet Coke as it happened.
Then I was standing, spilling my Coke and yelling "Oh S!" loud enough that the neighbors came knocking.
Yeah, I remember it.
For fans of MMA, heavy metal music or general absurdity, follow me on Twitter!