Carn is just showing off and making himself look bigger than he is. He's quick but he's never been that quick. He's a guy with moderate strength and skill and high speed but poor resistance, magic, and subpar in the rest of the stats. He can't take too many hits due to his frail structure for example. It's all about precise and deadly stabs and slashes with him and this was just him showing off his speed.

Take it this way: It's like a in-fighter boxer hitting a sandbag and saying that weird because he normally sends it flying in all directions with a couple punches.