"You can say that again" means expressing full agreement and even encouragement to what was said, which makes pg11 look kind of funny in context. You might want to use "Try saying that again" or "I dare you to say that again" or something like that instead, considering Giril probably isn't playing backup dancer to his own humiliation. Haven't seen the raws or anything myself, mind you.
In other news, yet again we ignored the use of strong or audience reaching attacks, proving how bad of a narrative asspull the hook for the last mini arc was. The demonology part is kind of entertaining, but along with all the other weirdly flowing stuff, the author really cannot fuck with narrative consistency if it killed him, it seems.