- Peter Venkman: Okay, Egon, come clean, have you been playing Mad Scientist again?
- Egon Spengler: Peter, I haven't run an experiment for a week. This is a total mystery to me.
- Winston Zeddemore: It worked!
- Ray Stantz: All right!
- Egon Spengler: [less enthusiastic than the others] Yippee-yo-kajee.