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Rolling downhill...NFL uses them, more and more college conferences start using them, now apparently more and more HS guys are using them. Only thing I have ever heard that makes any sense is that blue is easier to find in the snow than white. (Have heard that some back judges use one color for spot of illegal touch and another for spot where kick ends) Apparently they can't recall which is which when they have 2 white bags down on a kick play.
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