- Can you prove it?
- Ask the taxi driver!

2 seconds sound clip from the Trail of the Pink Panther (1982) movie soundboard.

You can hear this line at 01:12:47.330 in the Blu-ray version of the movie.

Quote context

[...]

- Arthur, there's an old saying. Never bullshit a bullshitter.

- Yes, of course, sir.

- Yes, great arse indeed.

- Bruno? Can I get out now?

- Yeah.

- I don't think she has such a great ass.

- What do you expect me to do?

- Arrest him.

- On what charge?

- He threatened me. He had me kidnapped.

- Can you prove it?

- Ask the taxi driver!

- You said it was the taxi driver who kidnapped you.

- Bruno's men forced him to. They had guns.

- Did you see the guns?

- No, but the taxi driver told me...

- I'm perfectly certain that everything you've told me is true.

- But...

- But I'm equally certain that Monsieur Langlois will deny it.

- Monsieur Langlois?

- What it boils down to...

- What it boils down to is his word against mine.

- Exactly!

[...]