The kid with the mysterious smile
Sometimes an extra may completely derail a scene. It happened in far too many films to list, including Titanic. Third-class passengers attempt to escape to the upper deck as the ship slowly sinks and the decks fill with water. However, as the crew attempts to maintain them below, they are greeted by shut gates. Everyone is terrified, with the exception of one child who is actually… smiling? Even if he wasn’t aware of what was going on, the sight of all these adults yelling and crying would be enough to upset any child.