But I'm not a serpent.
4 seconds sound clip from the Alice in Wonderland (1951) movie soundboard.
You can hear this line at 00:37:22 in the Blu-ray version of the movie.
Quote context
[...]
- I'm tired of being only three inches high.
- A serpent! Help! Serpent! Serpent!
- Off with you. Shoo. Go away. Serpent! Serpent!
- Indeed? Then just what are you?
[...]