- Daddy, it won't float.
- It's not supposed to float. It's a submarine. It's a boat that goes underwater.

7 seconds sound clip from the Clear and Present Danger movie soundboard.

You can hear this line at 00:12:45.982 in the Blu-ray version of the movie.

Quote context

[...]

- It won't float!

- John, what do you want, toast or...?

- Waffles!

- I don't have time for waffles. You can have toast or toast.

- Anybody seen my keys? They're either on the front hall table or in your pocket. Now, where are my keys? Shoot.

- Toast, please.

- Thank you.

- Bye, honey.

- Bye, Dad.

- Bye, pal.

- Daddy, it won't float.

- It's not supposed to float. It's a submarine. It's a boat that goes underwater.

- Hello? When?

- I thought I had the flu. I'd still think I had the flu if they weren't telling me otherwise.

- Well, what... What are they telling you?

- Pancreatic cancer of an aggressive nature, if I heard them right. Jesus.

- Well, what does that mean?

- I guess it means I'm in big trouble.

[...]