I know a man with a wooden leg named Smith. And Michael says, Really? What's the name of his other leg?
9 seconds sound clip from the Mary Poppins movie soundboard.
You can hear this line at 02:09:09 in the Blu-ray version of the movie.
Quote context
[...]
- It turns out, with due respect, when all is said and done, that there's no such thing as you!
- Speaking of impertinence, would you like to hear a perfectly marvelous joke? A real snapper!
- The man's gone mad. Call the guard!
- Supercalifragilisticexpialidocious. I'm feeling better all the time!
- Banks, don't you dare strike my father!
[...]