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		| Originally posted by MN 3 Sport Ref 
 
	We are also encouraged to do this in my area to prevent double whistleQuote: 
	
		| Originally posted by Troward My assigners have asked us to use the open palm signal and then the jump ball, thumbs up signal. The rationale is that you prevent a double whistle scenario where one official has already given the jump ball signal and the other has a violation/foul.
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 How does the hand signal that you are using prevent double whistles????  It may keep you from having different calls, but I will have trouble believing that it will keep the other official's whistle from blowing just because you have an open palm instead of thumbs up.