People who text while driving are on par with flesh-eating zombies, according to a new PSA from California's Office of Traffic Safety. The spot below, created by Glass Agency and Bully Pictures, is based on Carnegie Mellon research about the effect of phone distractions on drivers. "It reduces brain power by 37 percent," says Chris Cochran, a spokesman for the state agency. "When you drive and use a cell phone for talking or texting, you're essentially driving like a zombie." It's not a perfect metaphor, but I suppose texting zombie drivers are a more serious problem than texting zombie pedestrians.