You have no idea where you're going!
4 seconds sound clip from the Tropic Thunder (2008) movie soundboard.
You can hear this line at 00:53:34 in the Blu-ray version of the movie.
Quote context
[...]
- This is insane! Are you really going to abandon this movie?
- We're supposed to be a unit!
- All right, fine. I'll finish it by myself.
- You go be all you can be, man.
- You have no idea where you're going!
- I'm going to, Exterior, rain forest, dusk.
- Smash cut to Four Leaf, who treks alone through a frightening jungle.
- Come on, men. Let's get home.
[...]