Sure, any four (or 4 groups of two in this case) has the same chance of appearing. But... these were a "special" 4 under special circumstances. Coincidence? No way!! I was watching her practice! Context is a big part here. I would love to have a big data set of wheel rolls from all over broken into individual dealers and wheels. Collected without knowledge of the dealer of course (which would likely change that which is observed).