Thread:ExiledRecon/@comment-24004594-20131001052454/@comment-16832686-20131002004921

His entire arm isn't covered by lightning, leaving his arms unprotected. And with Koshiro unable to feel pain (From your Genjutsu) he could attack without flinching. Koshiro's thread are also incredibly fast. So attacking through his unprotected arm, as it plunged towards his arm, is highly plausible.