39000 meters.
4 seconds sound clip from the Alien (1979) movie soundboard.
You can hear this line at 00:14:54 in the Blu-ray version of the movie.
Quote context
[...]
- Prime ventral. Prime dorsal.
- Locked and floating. You can drop us anytime now. We'll catch you.
- Inertial damping's going off. Hold on, people. There's gonna be a little bump.
- Pressure drop in intake three. Must've lost a shield.
[...]