Two of the nation’s most explosive college football players went head-to-head in a mirror drill at the Opening Monday.

The drill, which features a linebacker attempting to follow the movements of a running back, saw two of the country’s best athletes, Penn State running back Saquon Barkley and Texas linebacker Malik Jefferson square off.

That’s not an exaggeration. Barkley was No. 6 on NFL.com’s recent list of college football’s biggest freaks, in part for running a 4.33 40-yard dash, a 4.00 short-shuttle time — which, like the mirror drill, tests change of direction — a 38-inch vertical, a school record 390-pound power clean (that he's recently topped) and a 600-pound squat.

And Jefferson might just be the fastest linebacker in the country, running a ridiculous 4.39 electronically timed 40-yard dash at the Opening when he was a high school star.

As for the drill itself, it just goes to show how freaky each player is. Barkley gets the edge on Jefferson early with his absurd quickness, but Jefferson shows remarkable balance to be able to right himself, and the agility to mirror pretty well afterward.