When describing a complex process to someone without the knowledge to understand the technical jargon, when the person your telling it to really doesn't need to know, or doesn't care.
Programmer to Designer:
Designer: So the url for rendering resized images, how does it work?
Programmer: Just use /imagerender?url=/media/somepic.jpg&maxWidth=1200&maxHeight=300, use whatever width/height you want, the resizing is done automagically.
When you write a big MASSIVE program in one shot in a speed programming burst and fire it up for the first time and everything works, no errors, functioning exactly as intended. You test it, it passes every test. QA even passes it and it goes straight to release. No bugs are ever found with it.