How did that just happen? How did -- how could an injury just heal like that? It's not right. It's just not possible. There's not even a mark. He keeps staring at the sword like it's betrayed him, and his wounded pride can't hardly muster a spark of indignation at the laughter. He's just too floored.

At least until the question. Then he's stepping back, throwing his shoulders up defensively.

"Wh -- Why would I kill someone! I'm not a Decepticon!" Just a delinquent.