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					Originally Posted by Welpe   | 
	
 I think U1 saw the PU's left arm pointing fair and thought his other arm was up and he was calling it foul.  I think the runner blocked him from seeing the other arm and whether or not it was in the air.  Of course there should have been a verbal cue to go along with the arms in the air if the PU was calling it foul.  Just a theory.