Brock Lesnar is a monster of a dude, but in UFC, size means shit. UFC 81 fight between Brock Lesnar and Frank Mir is the proof of that. It also showed that being big because of excessive steriod use doesn't guarantee you nothing, not in UFC fights.
Brock Lesnar came to the UFC from wrestling, for which he has my utmost respect. He abandoned a joke and joined real sport. However in UFC all punches are real and it's likely Brock Lesnar's never even heard of a leg lock. When Frank Mir got him leg locked, Brock Lesnar tapped out. Most likely out of sheer surprise, cause the lock itself wasn't that strong. He likely panicked because in real fight (not WWE staged bullshit) your leg could actually break. So he ended the fight as soon as there was a sign of possible harm to his girly legs (BTW, did you notice how girly his legs are, totally unproportianate compared to the size of his monstrous upper body). Well, Brock Lesnar.... welcome the the world of real fights. Much respect for you though for moving on to UFC from WWE.
The highlight of UFC 81 were all those blank stares on faces of the WWE guys whose egos went right down the pooper after Brock Lesnar lost the fight. I can only imagine how full of shit their roid pumped mouth would get should he win - they would be like... yeah baby, WWE for realz, baby.
Brazilian jiu-jitsu once again proves to be as strong as ever.
Believe me Pornask, that leg lock in the picture is painful and will make one tap out. It wont break your ankle but it can surely tear the ligaments. I teach Silat and we have tons of locks like that, they hurt like hell.
YOu are also right as far as being a big guy is not everything. What counts in a one on one fight is conditioining, grappling technique, the ability to box and counter a Thai kick, and most of all heart (guts). On the ground you can't beat Jiu-jitsu at least at this point in time. There are many arts that are still in villages that no one has brought out to the public that may counter Jiu-jitsu. When everyone masters it then another will come and take its place. It happened first with Karate, replaced with Kung Fu, which was countered with Filipino Kali, and now Jui-Jitsu is the top art. Many people have not heard of Silat which is an awesome art as well. It comes down to the person. The Gracies kicked ass in the beginning because no one understood or trained in Jiu-Jitsu. Just like when Kickboxing was first popular then Mui Thai came and kicked all their butts (stand up fighting).