Boy, they came out of nowhere.

3 seconds sound clip from the Clueless (1995) movie soundboard.

You can hear this line at 00:02:20.983 in the Blu-ray version of the movie.

Quote context

[...]

- Josh is in town, he's coming for dinner.

- Why?

- He's your stepbrother.

- You were hardly even married to his mother and that was five years ago. Why do I have to see Josh?

- You divorce wives, not children.

- Here.

- Forget it!

- Did I show you the loqued-out jeep Daddy got me? It's got four-wheel drive, dual side airbags, and a monster sound system. I don't have a license yet, but I needed something to learn on.

- Boy, they came out of nowhere.

- Here's where Dionne lives.

- She's my friend because we both know what it's like to have people be jealous of us.

- Dude!

- Girlfriend!

- And I must give her snaps for her courageous fashion efforts.

[...]