He was very surprised when he looked sideways to thank the Baron for the warning only to see the Baron swing his fist at him to punch his face.
The competitor didn't even think about resisting when he was attacked because he couldn't and because he couldn't win even if he did.
If he attacked the Baron, that would count as disrespect and cause him to bear the Burden of Respect. That combineed with the Baron's D-rank power made a fight with him hopeless.
He shouldn't have to face this situation from the Baron after paying his respects. So he didn't understand what was going on.
The first thing that he thought to do was beg and create some distance between them. He asked in fright, "Sir, why are you doing this?"
But Kelvin didn't listen. He continued to attack him with a bone blade. He thrust his whole arm through the man's face.