Mark Rober designed a huge Nerf gun to win an office Nerf war. He talks to NPR's Lulu Garcia-Navarro about how he designed it, and what happens when you get hit with a pool noodle at 40 mph.

How do you design a Nerf blaster that’s appropriate for kids, but looks menacing enough to blow out a zombie’s brains? You get rid of the spiked knuckles for one. When the dead walk the earth ...