My initials! Just like in Journey to the Center of the Earth!

4 seconds sound clip from the Back to the Future Part III movie soundboard.

You can hear this line at 00:11:28.780 in the DVD version of the movie.

Quote context

[...]

- Whoa! I think you woke up the dead with that blast.

- Take this camera. I want to document everything!

- This reminds me of the time I attempted to reach the center of the Earth. I'd been reading my favorite author, Jules Verne. I spent weeks preparing that expedition. I didn't even get this far. Of course, I was only 12 at the time.

- You know, it was the writings of Jules Verne that had a profound effect on my life. It was when I was 11 that I first read Twenty Thousand Leagues Under the Sea. It was then that I realized that I must devote my life to science.

- Doc, check it out. Look at this.

- My initials! Just like in Journey to the Center of the Earth!

- That means the time machine must be right through this wall!

- It's been buried in here for 70 years, two months, and 13 days. Astounding!

- As you see, the lightning bolt shorted out the time circuit control microchip.

- The attached...

- Schematic.

- Schematic diagram will allow you to build a replacement unit with 1955 components, thus restoring the time machine to perfect working order.

[...]