This quote is revealing. Not sure if it has been posted here but I loved it and wanted to share.
"It was early August in Oxnard, California, and Kellen Moore, who had been taking most of the first-team reps at quarterback for the Cowboys, was off to have his broken ankle casted. Next man up would be the rookie.
Near the end of one of Prescott's first practices as the first-team quarterback, the Cowboys offense ran through a two-minute drill. With 12 seconds left, the ball was on the 42-yard line.
Prescott told Bryant he would hit him on a slant and instructed him to go down as soon as he caught it, so Prescott could clock it and Dan Bailey could attempt a game-winning field goal. Bryant nodded. The quarterback and receiver connected on the slant. But instead of going down, Bryant tried to score. He was stopped well short of the end zone and time ran out. The offense failed.
Prescott sprinted to Bryant and put his hand around the back of his neck.
"You are the baddest man on the field, the best player on the team," he told him. "But you have to listen to me. I told you that you had to get down. Look what just happened. We have the best kicker in the league."
Bryant listened intently, then looked him in the eye. Instead of shoving the rookie and storming off, he said, "I got you, man. It won't happen again."
http://thelab.bleacherreport.com/the-triplets-2-0/