Stunned Silence: Hiccup is rendered like this when he sees Mirabel in her wedding dress.
Wedding Episode: The chapter where Hiccup and Mirabel finally tie the knot.
Wham Episode: Hiccup and Mirabel are now officially husband and wife. They spend their honeymoon on a far-off island (implied to be New Berk) in a cabin Hiccup built, and discover a white, female Night Fury, or "Light Fury" there with them.