Dressed in a Superman suit with a red cape flowing behind him, a sweaty David Pfizenmaier jogs through Bangkok's standstill traffic and stops to unfurl a sign."If you love Thailand: Vote," it says, below the hashtag #supermanbangkok.Thais go to the polls this weekend for the first time since a coup in 2014.The 40-year-old Thai-German said Thursday he is not campaigning for a specific party, but is instead on a mission to boost turnout, especially among younger voters, "bec