With tight end Jordan Reed aligned in a tight slot position to the right and running back Chris Thompson split further outside, Redskins quarterback Kirk Cousins pounced on a defensive move. When safety DeAngelo Hall walked up to the line of scrimmage across from Reed, Cousins called an audible.
It turned into a touchdown pass, though if there had been officials it might have been a pick play (can’t rewind practice tape to check it if you don’t have it). But once Hall crept to the line, the Redskins changed to what amounted to a screen by Thompson. That freed Reed to run to the corner and catch Cousins’ pass.
As the story said, it was an example of how quickly the offense can adjust to a move by the defense. And the story said it's not just Cousins, but the entire offense. Something to keep in mind is Cousins, Reed and Thompson are in their third year in this offense, so they quickly were able to change their assignments.