In the opening scene, 15-year Hiccup is riding Toothless, 20-year old Hiccup uses the wingsuit and he and Toothless are flying, 21-year old Hiccup and Toothless are relaxing at Berk, 30-year old Hiccup is riding Toothless in the clear sky.
Zepher, Nuffink Dart, Pouncer and Ruffrunner are grown up.
Hiccup shaved his beard and ride Toothless.
Fishlegs shoves Hiccup in his face with the dragon helium.
When Toothless turns 43-years old, his left tail fin grew back.
