The Kansas City Chiefs were evaluating North Dakota State's Carson Wentz as a draft prospect when they came across a pass play that, more than a year later, would spring rookie running back Kareem Hunt for a 78-yard touchdown catch against the New England Patriots. The NFL playbook has long been a revered document packed with foundational text and illustrations, but it isn't a static one. New plays find their way into the huddle any number of ways. Here are three examples, including the longest reception by a running back against New England during the Bill Belichick era, the longest run by a quarterback in NFL history, and a play that ranks No. 1 on a head coach's list of favorite playcalling moments.