Day 12 is here in the Reebok Pump Twitter contest giving away a pair of limited edition Pumps each day from now ’til November 20th. To win today’s pair, simply answer this question: “What other extreme sport was used in an early Reebok Pump ad?” Retweet this question along with your answer before Midnight EST today to @Reebok and use the #PumpJump hashtag. You can also follow us here @counterkicks for the latest sneaker news, Reebok Pump 20 updates, and our own Twitter contests coming soon. Look for our exclusive piece on Reebok ERS and Hexalite cushioning technologies with Reebok Pump inventor Paul Litchfield coming later today.