They bought it.
3 seconds sound clip from the Ferris Bueller's Day Off movie soundboard.
You can hear this line at 00:03:13 in the Blu-ray version of the movie.
Quote context
[...]
- It's nice to know that I have such loving, caring parents. You're both very special people.
- Now, you get better, pumpkin.
- I'll be home at 6:00 sharp. If you need anything, call.
- Incredible. One of the worst performances of my career, and they never doubted it for a second.
- How could I possibly be expected to handle school on a day like this?
- This is my ninth sick day this semester. It's getting pretty tough coming up with new illnesses.
- If I go for 10, I'm probably gonna have to barf up a lung. So I better make this one count.
[...]