I was working on a black poster with white text on it.
Client: There is something wrong with your design, it won’t work.
Me: What exactly isn’t working?
Client: I think you made it wrong. It won’t print properly.
Me: OK. Tell me what the printing company said to you.
Client: I printed it by myself to save money.
Me: all right, so printed out the normal file on your office printer, right?
Client: Yeah, and I even bought nice paper for it but the printer refuses to use your file.
Me: Right. Can you double check what colors of ink your printer has?
Client: Are you kidding? The normal ones! Red, yellow, blue, black and whi…
Client: …Please forget I called.