Former NASA engineer creates world’s largest NERF gun
Remember when your mom told you that one day you'd outgrow NERF guns? That might be true for some of us, but not one former NASA engineer. Not only did he not outgrow NERF guns, the NERF guns outgrew him! At least, one did. He just had to build it himself. Former NASA engineer-turned YouTuber Mark Rober and two engineering buddies designed and built the world's largest functional NERF gun. It's a giant scale-up of a classic NERF pistol, ramped up with a 3,000-psi paint ball canister.