- Well, I got to thinking about what you're gonna do.
- And just what am I gonna do?

7 seconds sound clip from the El Dorado (1966) movie soundboard.

You can hear this line at 00:41:02 in the Blu-ray version of the movie.

Quote context

[...]

- Hey, you fall off your horse?

- Yeah.

- You hurt?

- No.

- Well, there's something the matter with you.

- Look, I got a bullet in my back. Sometimes it presses against something, and I get a screaming pain, and then there's nothing. It goes numb, and I can't use this hand.

- How long does that last?

- Just for a while.

- Why are you following me?

- Well, I got to thinking about what you're gonna do.

- And just what am I gonna do?

- You're going to that town El Dorado and help your friend against McLeod and his bunch.

- How do you know he's my friend?

- That look on your face when you heard he turned into a drunk.

- Well, this thing's wearing off.

- Give me a hand up on my horse.

[...]