When he was struck, Setsuna didn't much feel the pain, so angry was he, but there's a small bit of blood that flies before his eyes, and once again, the blond finds himself too sleepy to stand and collapses without another word or movement. All he can think to himself is, "Dammit. Not again," and worry about the Doctor to himself. Otherwise, he's completely fine, rather used to getting smacked around by now anyway.