It's the best day of my life.
4 seconds sound clip from the Ferris Bueller's Day Off movie soundboard.
You can hear this line at 01:20:22 in the Blu-ray version of the movie.
Quote context
[...]
- There's somebody you should talk to.
- If you say 'Ferris Bueller,' you lose a testicle.
- It's the best day of my life.
- I'm gonna miss you guys next year.
- Cameron? Can I ask you a question?
- Yeah.
- That's okay. I'm not embarrassed.
[...]