Ah, that's just a figment of your imagination.
3 seconds sound clip from the Muppet Treasure Island movie soundboard.
You can hear this line at 00:41:13.133 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, Smolly, my love for you is deeper than the deep, blue sea.
- Well, at least one of us is having a good time.
- Angel Marie said that later on, he'd throw a line out the back and let me drag along the bottom.
- Ah, that's just a figment of your imagination.
- This is a figment of my imagination?
- Now, tell us where the map is or we'll tear ya limb from limb!
- Never. My friend and I will never tell.
[...]