The software development lifecycle as told by a stroller:
First, we have the Feature - pristine, untouched, still in the showroom. Marketing's dream child with those sexy green wheels.
Then comes Dev Testing - "Yeah, it works on my machine!" The developer casually strolls with it, confident everything's fine because they're walking on a smooth, predictable path.
Next up: QA Testing - Sprinting through the mall, pushing it to its limits, trying to break that sucker before release. "But have you tried clicking the button 17 times while holding Shift?"
Finally, the User - a crude stick figure flying off a skateboard while the stroller crashes separately. Because in production, users will find ways to break your code that you couldn't imagine in your wildest fever dreams.
And that's why we can't have nice things in software.