By giving people the tools to turn 3d creations into real things, Pettis has created a spark-plug for the 3d world.

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These include the plug-in Volt and the Cruze, Spark, Aveo and Malibu from Chevrolet, along with two smaller Buicks.

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With the Chevrolet Volt, Chevrolet accounts for more than 50 percent of all plug-in electric vehicle sales in the United States and Spark EV builds on Chevrolet's proven electric motor and battery development programs.

ENGADGET: Chevy details 2014 Spark EV: under $25,000, 0-60 in 8 seconds and a 20-minute fast charge

Far from being a spark plug for crowd trouble, I believe anthems, whether booed or sung with lung-busting gusto, add to the atmosphere of the game and put fire in players' bellies.

BBC: SPORT | Football | African | To sing or not to sing

Red Bull did not test the constructors' championship-winning RB6 in the first winter testing session of 2010 and suffered early-season problems when Sebastian Vettel lost the lead at the Bahrain Grand Prix because of a spark plug problem, finishing fourth as a result, before retiring in the following race in Australia with a wheel problem.

BBC: McLaren deny missing winter testing session is risky