I have to tell you, that's precisely what I saw.

4 seconds sound clip from the Platoon movie soundboard.

You can hear this line at 00:35:24 in the Blu-ray version of the movie.

Quote context

[...]

- I got to run. I'll catch you men later. Enjoy yourselves tonight.

(BELCHES)

- Well, that is one sorry-ass motherfucker.

- What do you say there, Bob?

- A guy like that make it? Yes or no?

- I have to tell you, that's precisely what I saw.

- I mean, sometimes I just look at a guy, and I know. This fella's not gonna make it. Just no fucking way.

- Yeah! I'm going now.

- Come on, now!

- I want some, now.

[...]