My friend John, a sound technician (also known as a "sound guy"), told me of an encounter he had with a singer for whom he was running sound. She had apparently heard him say something that he denied telling her, and therefore she accused him of lying (in the friendliest way, of course). He responded with confidence, "Sound guys never lie." Then he asked me to make a shirt out of it. So I did. (Also available for sound girls.)

Here's a shirt for all the folks who believe the phrase "honest sound technician" is redundant