Conversation between a designer and his client, looking at a Photoshop image:

- "The reflections in the water should be
at angle opposite to the sun."
- "Um, no. The SHADOWS of objects would be at an
angle away from the sun, but a reflection is always
perpendicular to the reflective surface."
- "No, you're wrong. Go back and point all the
reflections away from the sun."
- "Well, that would start to look kind of strange.
Say, I have a small mirror at my desk;
let me go get it so I can show you what I mean..."
- "Don't get difficult with me!"

Source: Unknown