I once shipped a product whose app icon within the app disappeared if clicked, revealing a square “monitor” with a small version of Breakout you had better star

I once shipped a product whose app icon within the app disappeared if clicked, revealing a square “monitor” with a small version of Breakout you had better start playing with your left/right arrow keys because the game started upon appearance. EDIT: In a user's guide I introduced diagrams of calculations with points for scalar values, vertical bars for vectors, and then square 2-D grids to represent matrices, which I referred to as "waffles". With "waffle", referenced by page, in the index at the back of the guide. I wondered if anyone would register the mild ridiculousness, but I had people coming up to me in conferences later laughing about matrix waffles.