- Good morning, you Mongrels!
- Good morning.

5 seconds sound clip from the Donnie Darko movie soundboard.

You can hear this line at 01:05:43 in the Blu-ray version of the movie.

Quote context

[...]

- What is it like?

- It's complicated.

- It's like a force, you know, in your brain that just sends you someplace.

- Well, do you go someplace familiar?

- No, but... Actually, each time I keep waking up farther and farther from my house.

- That's scary.

- Donnie Darko.

- I know.

- Good morning, you Mongrels!

- Good morning.

- Is that all the gusto you can muster? I said, Good morning!

- Good morning!

- Now that's a tiny, tiny bit better. But I can still sense some students out there who are actually afraid to say, Good morning!

- Good morning!

- Yeah, that's what I like to hear! Because entirely too many young men and women today are completely paralyzed by their fears.

- They surrender their bodies to the temptation and destruction of drugs, alcohol, and premarital sex.

[...]