Flapping Cheeks

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A character who is blasted in the face by a strong current of air — whether because of wind resistance from moving at great velocity (i.e. dog sticking its head out a car window, or human strapped into a very fast rollercoaster), facing a powerful fan, or getting caught in a strong wind — gets their lips and cheeks stretched backwards and flapping in the air with a wet sound, with the gums grotesquely exposed and droplets of saliva sprinkling. This is almost always a source of slapstick comedy and it's to exaggerate in animation, in which case the cheeks can stretch like rubber to impossible proportions.

Often happen to victims of a Centrifugal Farce. Compare Rubber Face for a different kind of stretchy facial features.

Examples:

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    Anime and Manga 
  • Berserk: In the Birth Ceremony Chapter, when Isidro and Puck track Casca and Nina's whereabouts to the cave where the pagans have kidnapped them, Isidro tells Puck to fly with the news to Guts as fast as he can while Isidro himself stalls for time. Fully appreciating the urgency, Puck launches himself at such cartoonish speed that the air resistance causes his cheeks and even his eyelids to flap!

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    Film - Animated 
  • At the end of Toy Story, when Woody and Buzz Lightyear fly on a rocket to catch up to Andy's car, Woody's cheeks flap around from the wind in his face. Buzz isn't affected, because he's wearing a helmet.

    Film - Live Action 

    Live Action TV 

    Music 

    Western Animation 
  • Happens to Johnny Bravo as he looks out the window of a hi-tech bullet train in the episode "Runaway Train".
  • Phineas and Ferb
    • In the episode "Out to Launch", it happens first to Phineas as he's training on a makeshift centrifuge (actually a merry-go-round), and later to Candace once she finds herself on board of a starting rocket (she complains that she can't hear anything because the flopping cheeks are covering her ears.)
    • Taken Up to Eleven by Ferb when repairing & "tricking out" Meap's spaceship - not only do his cheeks flap, but his whole face comes off his skull, which he pulls back onto himself.
  • Occurs sometimes in My Little Pony: Friendship Is Magic, e.g. to Rainbow Dash as she flies at supersonic speed in "Sonic Rainboom."
  • The Simpsons: In "Deep Space Homer" both Homer's and Barney's cheeks flap when subjected to a centrifuge during astronaut training.
  • In the My Little Pony: Equestria Girls movie, when Twilight introduces herself to the human Pinkie Pie, Pinkie, surprised that Twilight knows her name, lets go of the end of a balloon she was blowing up, which blasts the air into her face causing her cheeks and lips to be blown back.
  • Exaggerated in the Roger Rabbit Short Roller Coaster Rabbit, with Roger's cheeks and eyelids flapping way behind his face.

http://tvtropes.org/pmwiki/pmwiki.php/Main/FlappingCheeks