A few years ago Cris Collinsworth appeared on NFL Total Access one day and spoke on the idea of play-action. This was at the peak of football fans debating that play-action was only effective when you “established the run”, a point that Collinsworth mentioned it took him a “lifetime” to understand was not the case.
Here is the clip in question:
Cris Collinsworth on Wednesday's NFL Total Access talking play action and the Dallas Cowboys: “Play action is effective regardless of how you’re running the football. Now it took me a lifetime to get to where that became a fact in my brain.