Marc Summers walked out of his ‘Quiet on Set’ interview after being “ambushed” by producers. The 72-year-old star famously hosted ‘Double Dare’ for Nickelodeon in the 1990s and was due to appear in the new documentary – which explores the allegedly exploitative culture of the kids’ TV network in the 1990s and early 2000s at the hands of producer Dan Schneider – but explained that he stopped the chat after a matter of seconds because he couldn’t handle it. Speaking in an upcoming clip from his appearance on ‘Elvis Duran and the Morning Show’, he said: “They asked me what I thought of [Nickelode…