Sophie Turner, Kit Harington, Isaac Hempstead Wright and Maisie Williams in a scene from 'Game of Thrones.' Fans got a taste of the modern world when eagle-eyed viewers spotted a takeout coffee cup on the table during a celebration in which the actors drank from goblets and horns. Courtesy HBO 
Sophie Turner, Kit Harington, Isaac Hempstead Wright and Maisie Williams in a scene from 'Game of Thrones.' Fans got a taste of the modern world when eagle-eyed viewers spotted a takeout coffee cup onShow more

Think an errant coffee cup is bad? Here are 13 more surprising movie continuity nightmares