There's no foot inside, but there's candy or sometimes it's filled with small toys.
7 seconds sound clip from the The Nightmare Before Christmas (1993) movie soundboard.
You can hear this line at 00:22:57 in the Blu-ray version of the movie.
Quote context
[...]
- We pick up an oversized sock and hang it like this on the wall.
- Oh, yes, does it still have a foot?
- Is it rotted and covered with gook?
- There's no foot inside, but there's candy or sometimes it's filled with small toys.
- Perhaps they just spring out and scare girls and boys
- What a splendid idea. This Christmas sounds fun.
- I fully endorse it. Let's try it at once.
- Everyone, please. Now, not so fast There's something here that you don't quite grasp.
[...]