Its all mind games, Lyoto (of whom I am not a huge fan) has found a game plan that works. Rampage is trying to get into his head and get him off his game. He's trying to get Lyoto to think:
"Boring!? I'll show him boring! I just had a 1st round KO! I have knock out power! If/when I fight Rampage I'm going to stand toe to toe with him and show him how boring I can be!"
In which case Rampage goes all Rampage-like and breaks his face.