PASSAGE-V: Martin had many little tricks highly entertaining to his son. On an evening, returning from the market, he would buy a paper mask, the head of a hissing dragon. He would put it on and knock at the door. On opening the door, the boy would be terrified for a moment, but only for a moment, for he would soon remove it and the two would roll with laughter. Tom would, then, go out with the mask and knock at the door for his father to open. Martin had to act as if he was paralysed with fear. Which of the following statements is the most appropriate description of the mask?