Writing & Editing The world’s hardest tongue twister Can you say “pad kid poured curd pulled cold” 10 times fast? You probably can’t. MIT researchers found certain sound combinations, when spoken quickly, make people lose control of their mouths. By Kristin Long@KristinMLongDec. 6, 2013 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.