internet rumor that raffaele bendandi, a wacky seismologist, predicted back in 1915 that this city of piazzasbig one. actually he never said that, ever. >> i think that it was something that went on the internet and got rebounded around and people are superstitious. need something to believe in. >> reporter: this roman panic, a social media wildfire and a viral lie. authorities forced to fight back online and off. "there are no geodynamic conditions for this to happen in rome," this level-headed egghead told local tv, and as the day wore on, nothing. romans claimed they were never scared anyway. >> how can you believe a thing like that? >> reporter: now the eternal city is, um, still here. still, eh, eternal. nick watt, abc news, better safe than sorry, in london. >> well, of course out interviewing a lot of people out in rome and one bar owner was getting interviewed. take a look at this. the pittsburgh steelers. >> a little slice of americana over there. steeler nation. the steeler nation's everywhere. some the most rabid fans on the planet and even overseas. >> find that logo in a lot of r