Board Thread:Versus Debates/@comment-31171723-20170128170340/@comment-25122992-20170207180538

I already explained it. Yamata no Orochi was Orochimaru's physical extention of his body, it worked the same way as if his actual body was pierced (though it's pretty much the case, since Itachi stabbed Oro himself emerging from the snake's mouth). Nagato was pierced through the body directly, so of course it immobilised him. Susanoo isn't a physical extention, but pure chakra. Unless TB would stab Madara's actual body, there's no guarantee that TB can immobilise him only through Susanoo itself.