The various patches of frost Jack left behind as he raced around created something of a slip hazard. Not much of one, if you were prepared for it, but it was there all the same. Hiccup, for instance, was not expecting it, and missing a foot didn't help matters.

Hiccup slipped, yelped, and fell, landing straight on his back.

"Where did all this ice come from?" he griped as a mildly concerned Toothless helped him back to feet.