[ Loving being tugged in as he is, Jack pulls a face and rolls his eyes. He crumples forward and wheezes like an old man, copying Hiccup's gesticulations and hobbling on his staff. ]

Oooh, I'm Hiccup the old man and I'm sooo smart, I know eeeverything about science and aaalways did! Whoops, there go my teeth. I suppose that's gravity at work, the little tyke!