The next time you're on the road (and not driving yourself ) notice a car's wheels fast turning. As you see the rotating wheel look at an area to the left of the wheel and quickly move move your eye pointing to the right of the wheel. Then for a split second you can see the shape of the wheel and the patterns, as if it has stopped.

This experiment can be conducted on any other fast moving/rotating object.

My question is what causes your eyes to see fast changing shapes in a split second when you move your eyes across it quickly.

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P.S. This is what part of the alphabet would look like if Q and R were eliminated.

-- Mitch Hedberg