A bomb scare at a Hooters near the ArcLight Hollywood had some slated A-list guests deciding to steer clear of a premiere for Colin Firth’s indie film “Arthur Newman.” But sources said that, even as helicopters circled above and streets were shut down, Firth and co-stars Emily Blunt and Anne Heche managed to make it through the chaos. Other brave guests included Blunt’s hubby, John Krasinski. Much-needed Purity Vodka drinks to steady nerves were served after at Wood&Vine.