MythBusters - Season 11 Episode 11 Zombie Special Failure is always an option.
Overview: Adam and Jamie test two myths about the power of the zombie hoard. First, can they really break through a door thanks to working as a team of pushing power? Second, what's the perfect weapon to use against the zombie hoard: gun or ax? Then Kari, Grant and Tory unleash their inner beast too as they find out if it's really inevitable that zombies will catch you even though they only shuffle at 2 miles an hour!