Copilot wrote some CSS. The website turned into a disco nightclub.

🤣 Symptom — What happened
Developer asked GitHub Copilot to write a 'smooth gradient background' in CSS. AI generated a @keyframes animation that cycled through every color at 10 flashes per second. The entire office put on sunglasses. One coworker said it triggered their migraine. The code was mathematically perfect and ergonomically disastrous.
🔍 Diagnosis — Why AI did that

AI's interpretation of 'smooth' differs from humans. To a human, smooth = one transition per second with gentle easing. To AI, smooth = linear interpolation at maximum cycle speed. The model has no physical experience — it doesn't know what 10 flashes per second feels like to human eyes.

💊 Prescription — How to fix & avoid it