Ah, it's all a waste of time.

2 seconds sound clip from the Fiend Without a Face (1958) movie soundboard.

You can hear this line at 00:40:55.144 in the Blu-ray version of the movie.

Quote context

[...]

- It was the noise of the jets that did it, nothing more. It frightened the herd. But I can tell you that the herd is normal again. They've got used to it.

- Thank you.

- As for the deaths, gentlemen, we are equally at a loss to give an answer and equally disturbed. Now, there's been some talk of a mad G.I. On the prowl.

- Now, there's been some talk of a mad G.I. on the prowl. This, I can assure you, is not true. We've checked and rechecked our personnel.

- We know how you feel, but we're trying to protect our countries from a guided missile attack. If you'd only help us instead of fighting us.

- Ah, it's all a waste of time.

- Let's get rid of the base. We had no trouble before they came here, we'll have no trouble after they live.

(Man wailing)

- Gibbons!

(Barbara screaming)

[...]