Warren absorbed this. Was that all it was? It was a fight and he took a cheap shot against a helpless earth-bound mutant? Was he really that horrible? Nah...
"I'm an X-Man. I've had fighting experience." he said defensively, folding his arms and puffing his chest a little, unwittingly looking more like like a young rooster than the proud eagle he saw himself as.
True, he hadn't been... directly involved in many attacks or missions that put him in imminent danger. But still, he was a part of the team.
"And I don't need fighting lessons from you." the way he said "you" was derisive, and he scoffed at the thought. He hadn't seen anything overly impressive in their brief spar from him either, and judging by the way he dressed and his bad manners, he wasn't about to anytime soon.