Canvas Back Duck
From Wikipedia, the free encyclopedia
Canvas Back Duck is a Disney animated cartoon short in which Donald Duck, visiting a carnival, is tricked by a shifty barker into fighting "Pee Wee Pete" - who is really Pegleg Pete, a big truculent bruiser who outweighs Donald about twenty to one. In spite of help from Huey, Dewey and Louie, the situation looks desperate (but not serious) for poor Mr. Duck, until his soft tiny fist accidentally connects with Big Pete's jaw, which crumbles. It turns out the big goon has a glass jaw. Literally, of course. Donald wins the prize money and exits the carnival triumphantly with his nephews.
The incident ended Pete's boxing career for good.