One day, someone came in to work with a coffee mug with a picture of a Vax on it. The next day, some else brought in a Cray mug. "Mine's faster", he bragged. The next day, someone else brought in a mug with an F-4 fighter jet, explaining "yours don't even move, mine's actually fast!" So I brought in a mug with a SR-71 on it, figuring I had won that war. The next day, someone brought in a space shuttle mug. Oops.