This is compressed air.
3 seconds sound clip from the Jaws (1975) movie soundboard.
You can hear this line at 01:13:47 in the Blu-ray version of the movie.
Quote context
[...]
- Nowadays, these kids, they take out everything. Radar, sonar, electric toothbrushes.
- Chief, best drop another chum marker.
- What the hell kind of a knot was that?
- You screw around with these tanks, and they're going to blow up.
- Seen one eat a rocking chair one time.
[...]