@NFL

The 40-yard dash at the NFL Scouting Combine is a big opportunity for pro prospects to turn the heads of scouts in Indianapolis. But pressure during the drill is also very high, as a small miscue could end up hurting a player's draft stock.

When every hundredth of a second counts, players are bound to make some pretty strange faces when sprinting those 40 yards.

Don't believe me? The NFL Twitter account released the "faces of the 40-yard dash," and some of the players seem really intense given their expressions.

The NFL tweeted out Part 2 of the faces of the 40-yard dash the very next day, showing some of the bigger players on the defensive line as well as the linebackers.

While the first two parts were entertaining, part three may have stolen the show with the defensive backs.

[Twitter]