Lock one. Lock two. Lock three. Loch Lomond!
6 seconds sound clip from the Spaceballs movie soundboard.
You can hear this line at 00:15:57 in the Blu-ray version of the movie.
Quote context
[...]
- Why didn't somebody tell me my ass was so big?
- Hold on, sir. We'll try to reverse the beam.
- It could be the interlocking system.
- Lock one. Lock two. Lock three. Loch Lomond!
- Are you all right, Mr. President?
[...]