Troy Aikman's not a bad broadcaster, but he sure makes a lot of weird faces when he talks. Here's a Vine showing 28 different versions of Aikman's face taken from screencaps on broadcasts over the past four years.
You can click the Vine at any time to pause it. It's Troy Aikman Face Roulette! (You can also click "expand" in the corner of the top image to see some of our favorites at full resolution.)