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					Originally Posted by JRutledge  Is there a proper mechanic, or just opinions about that that mechanic is? I have never heard of a universal mechanic because so many umpires do different things. 
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 If you require "proper" to equal "universal"  there are very few proper mechanics.  Socalblue1 described what is taught at proschool and I described the variation taught at PBUC.  Both are proper.