This is Cowboy. Over.
3 seconds sound clip from the Jaws (1975) movie soundboard.
You can hear this line at 01:32:12 in the Blu-ray version of the movie.
Quote context
[...]
- No, no. Cease fire. Cease fire.
- Cowboy, it's Sergeant Murphy.
- This is Murphy. What is your present position? Over.
- Murph, we're receiving enemy sniper fire.
- Our position is about half a klick north of Checkpoint Four.
[...]