Put them all together, they spell TNT.

5 seconds sound clip from Batman (1966) - The Entrancing Dr. Cassandra (S3E25) TV Series.

You can hear this line at 00:06:23 in the Blu-ray version of the movie.

Quote context

[...]

- Dug, doc-y baby. But why the hang-up?

- Because I intend to succeed where my foremothers failed.

- The ancient alchemy has been handed down for generations through females of my family.

- All abject failures, nowheresville.

- Just like my family. They couldn't wait for the depression, they went broke during the boom.

- My great grandmother discovered how to transmute base metals into gold, but she cut out when she added CH3, CH2, H2 and N02.

- Put them all together, they spell TNT.

- They found pieces of her as far away as Londinium.

- Man, that was a trip.

- Now, Grandma perfected a universal solvent. Fell in the stuff and was universally dissolved.

- We buried her in a thimble.

- Well, how about dear old Mommy-o?

[...]