On the screen a pretty girl was pointing a revolver at a group of guests. They backed away with their arms held high above their heads and expressions of terror on their faces. The pretty girl’s lips moved. The fat hostess unclasped the necklace of huge pearls and fell, fainting, into the arms of a footman. The pretty girl, holding the revolver so that the audience could see that two of her fingers were missing, walked backwards towards the door. Her lips moved again. You could see what she was saying. ‘Keep ‘em up....’