Take it easy, you're not seeing a ghost. That's Whitey!
7 seconds sound clip from Batman (1966) - When the Rat's Away the Mice Will Play (S1E12) TV Series.
You can hear this line at 00:16:25 in the Blu-ray version of the movie.
Quote context
[...]
- Alright then, that's the way it'll be.
- You're a smart man, Mr. Wayne. We should get together sometime and discuss crime prevention.
- With pleasure. I'll look forward to seeing you in the near future.
- Batman!
- Take it easy, you're not seeing a ghost. That's Whitey!
- Great, uh, Gordon went for it like a duck to water.
- And that millionaire socialite Bruce Wayne was there also.
- Well, he fell so hard for the act that he helped sell our plan to Gordon.
- And the coast will be clear.
[...]