"I run away."

The inadequacy of that answer makes him laugh at his own ridiculousness. So much that he oversteps on his next thrust, tripping on his own feet and stumbling as the weight of the sword carries him into a stoop. When he regains his balance, he decides he should probably hand this sword back over to Aramis before he ends up slicing his own kneecaps off.

"I'm pretty good at it. Probably better than you."