"Ah, yes... the dead guy. But I incorporate a lot of jumping into my fighting style... I'm sure I could jump just fine, if not better than him. ...Especially now." He adds a little snide remark just because he can. Yeah, he has no idea. No idea whatsoever. Apparently he can't resist trying to prove himself 'better' somehow than this other Kain. Maybe he just doesn't like to admit how similar they are... and thus how he could very well make the same mistakes as him.