My idea of prison was that it would be a place to avoid. For the very reason that you are locked up. The food should be nutritional, but sh*tty, and tasteless. Everybodies head shaved, and no personal clothing. The work should be hard, no TV except for maybe Mr. Rogers,and forget air conditioning, and very little heat in the winter.
Now it's a place to vacation, and see your friends........
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20mph is not fast, unless you are doing it in a 3/2, 1000sq. ft. house on 10 ft. waves!