Klaus simply smiled. That was bound to happen.
If you fought the genius earth scientist like that and didn't fix your fighting stances, then you were asking to be humiliated.
Even more so now that Klaus has seen an abysmal improvement in his eyes and mind, making attacking key locations easier. Thanks to that he can easily identify weak spots in the opponent and will be able to attack them with great precision, so fighting him like that is not the best of ideas.
Rock was stunned, looking at the ground as if he had been dumb for a moment; the same happened to everyone around him.
After a moment of dazed silence, he looked up to see Klaus. Feeling the pain in his body, he raised his hand to the affected areas. "What did you do?" he asked with difficulty.