From a point & click adventure game based on the 1996 Pinocchio movie. The clips are live action.
At the 6:55 mark a boy and a girl ride the coaster from the movie and grow donkey ears and a muzzle. The girl brays a lot and laughs at the boy before realizing she's a donkey too.
https://youtube.com/watch?v=ipkTCaIIraE