Former NASA engineer builds the world’s largest NERF gun

Some might call it overcompensating, but when former NASA engineer Mark Rober shows up to a gunfight - he really shows up. No, we’re not talking the O.K. Corral, or the Death Star. We’re talking about the world’s largest NERF gun. With a little help, Mark Rober turns to his engineering know-how to create the largest functioning NERF gun you could ever hope to see, and imagine that you had the power to wield.