Derrius Guice runs angry.

Really angry.

He’s been dubbed “the ball of butcher knives” due to a running style that inflicts constant pain and punishment on defenders.

But what fuels Guice to run so hard? The intensity and effort he displays on every carry is not something that can be learned inside the weight room. The below video explores Guice’s tough upbringing and the choices he made that ultimately led him to the NFL:

Now, we’ll get to see how Guice’s violent running style fares against the best football players on the planet.

READ MORE:

• Meet Vita Vea: The Freakish 347-Pound Defensive Tackle Ready to Ruin Your Game Plan
• Marcus Davenport’s Quest to Unlock His Full Potential is Just Getting Started
• The Young Pro: Christian Kirk Has Been Training Like an NFL Veteran His Entire Football Life