Sir, hadn't you better buckle up?
3 seconds sound clip from the Spaceballs movie soundboard.
You can hear this line at 00:28:16 in the Blu-ray version of the movie.
Quote context
[...]
- Cancel the three-ring circus.
- Secure all animals in the zoo...
- Give me that, you petty excuse for an officer.
- Sir, hadn't you better buckle up?
(SPACESHIP GOING IN LUDICROUS SPEED)
[...]