Many people within the sport have said that MMA is often more psychological than it is physical.
In an MMA fight, the fight begins before either fighter even throws a punch—it begins when the two fighters look into each other's eyes.
Some fighters will stare down at their feet, while others will stare you down in a way that would make an average man soil themselves.
While some fighters try unsuccessfully to psyche out their opponent, these fighters have all mastered the art of the stare-down.
Have you ever looked into the eyes of a serial killer?
Let's hope not.
Even so, if you've ever had to stand opposite "The Dean of Mean," you might know what that feeling is like.
Jardine's recent performances haven't been all that great, but he still looks as mean as always.
On a side note, if you ever see someone driving an ice cream truck who looks remotely as scary as Jardine, be sure to get inside your house as quickly as possible.
Fedor doesn't possess a mean or scary demeanor; but that blank, emotionless glare he gives his opponents before a fight doesn't exactly make you think you're about to face off against one of the baddest men to ever compete in the sport.
While Fedor may have lost some of his mystique in his last two matches, he will once again begin screwing with heads as soon as he gets his career back on track.
If you follow Jon Jones on Twitter, it's easy to realize that the newly-crowned UFC light heavyweight champion is a very nice and down to earth kid.
However, all that niceness goes away once you put his foe in front of him.
As you can tell from the collection of photos, Jones shows no fear when his opponent is all up "in his grill."
Love or hate the guy, you have to admit that Bisping is one mean-looking son of a gun.
While there are many people out there that have Bisping ranked No. 1 on their pound-for-pound jerk list, the picture above shows why he can still put fear in his opponent's mind.
Well, that statement is true, unless his opponent is Dan Henderson, Wanderlei Silva or Rashad Evans.
Even though Sanchez now calls himself "The Dream," he can still give his opponent a nightmare.
Diego Sanchez is one of the most intense competitors ever to compete in MMA.
It doesn't matter if it's a face-off at the weigh-ins or just before the fight begins—he doesn't stare at you, he stares through you.
Those are the guys that will scare the hell out of you.
No, Vitor Belfort isn't staring-down a mime.
Behind that mask is arguably the best pound-for-pound mixed martial artist on the planet—Anderson Silva.
When it comes to stare-downs, Anderson is the same kind of enigma that he is inside the cage. He may be wearing a mask, he might get all up in your face or he may just turn the other cheek.
Whatever he decides to do, he seemingly always throws off his opponent.
Rampage became a born-again Christian a few years ago, but that hasn't stopped him from being one of the most intimidating people in the sport.
Even going back to his beginnings at Pride FC, Rampage has been known for his stare of death.
It was even better back then, when he was wearing a huge chain around his neck.
Too bad that the athletic commissions in the United States won't let him pull that off now.
The "Iceman" got his nickname by knocking people out cold, but it also fits his overall demeanor.
Every time he was face-to-face with his opponent, he looked like he had ice water flowing through his veins.
Hopefully, he'll be remembered for being the Iceman and not being put on ice.
Over the past five years, Wanderlei has gone from being the most feared man on the planet to an average fighter.
Back in his Pride days, there was nobody more feared than "The Axe Murderer".
His tattooed head, scarred eyebrows and flattened nose made him not only look scary, but also made him almost the best stare-down artist ever.
The fact he kicked the living hell out of nearly everyone didn't hurt matters either.
There are only two things you need to know about Don's stare-down.
Firstly, his eyes don't strike fear in his opponents—his mustache does.
Secondly, Don Frye and Chuck Norris cannot be in the same room at the same time.
Every time Chuck's beard sees Don's mustache, it cries out in fear.
Nobody on the planet is more intimidating when you look him in the eye. Nobody.