You will note, I imagine, that he is holding his bow in the overhand position (who knows if that's really the terminology), from which he can only fire sideways. Much like gangster movies in which they fire their guns pointed to the side, this is only for style, and generally frowned upon. I'll probably adjust one of his hands, because even though I meant for this to be the pose, it still bothers me just a little bit. We'll see.
EDIT: I've been told by two very helpful souls of the dangers of arm chafe. Here's the fix: