- At the age of 11, I was junior marble champion of Gotham City.
- Even then.

8 seconds sound clip from Batman (1966) - The Yegg Foes in Gotham (S2E14) TV Series.

You can hear this line at 00:05:37 in the Blu-ray version of the movie.

Quote context

[...]

- I heard Egghead say he didn't think you were Batman.

- And the machine worked, didn't it?

- Only too well, Dick.

- After years of mental conditioning, I was able to block off that portion of my brain pertaining to my dual identity.

- I couldn't have lasted much longer, though. All right, let's get down.

- You got it on the first shot.

- At the age of 11, I was junior marble champion of Gotham City.

- Even then.

- 12:03.

- I can't conceive of what happened to those three millionaires.

- It's all too incredible, but Gotham City now belongs to Chief Screaming Chicken.

- You better believe it, buddy.

[...]