I can't believe it. That's it, guys.
5 seconds sound clip from the The Goonies movie soundboard.
You can hear this line at 00:25:56 in the Blu-ray version of the movie.
Quote context
[...]
- Guys, I'm hungry. I know when my stomach growls, there's trouble.
- You made me go up this big hill and said you'd give me a Twinkie.
- Anybody got a candy bar? A Baby Ruth?
- I can't believe it. That's it, guys.
- Those three rocks out there. One, two, three.
- You touch that mirror again, and I swear to God I'm gonna smack you in the face.
[...]