It's one of 86 photos in a gallery at HuffPo. Unfortunately, the caption doesn't pinpoint that moment in the context of what was happening at that point.
US President Barack Obama (L) Republican presidential candidate Mitt Romney (R) participate in the second presidential debate at the David Mack Center at Hofstra University in Hempstead, New York, October 16, 2012, moderated by CNN's Candy Crowley. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
"Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it." -- Mark Twain