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			In what TXMike described, NCAA rules... in NF the ball is dead when B intercepts.  However, there is a rule provision giving A 1 point for what would be a safety on B.   
It happens when B provides new force (they cant actually gain possession) on a ball going into and out of their own endzone.
		 
		
		
		
		
		
		
		
		
	
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