I have a friend who is a flutist at the Royal Opera. When he has more than 50 bars rest he amuses his colleagues and friends by making drawings with musician motives. Here are some of them. Be aware of that they are copyrighted:
This is my favorite, the one with the two violinists and the cymbalist. The violinists are discussing the cadenza in Tchaikovsky's violin concerto and the cymbalist is thinking of the cymbals part in Dvorak "New World"-symphony: