The Christmas manual

It's Christmas night and Murphy hides behind the sofa to spy on Santa Claus who slips into his trailer to leave him a package. No sooner has Santa Claus left than Murphy tears open the present. He discovers a very sophisticated rifle. Convinced that this is the ideal weapon to capture Puck, he immediately goes out on the hunt. But very, very quickly, Murphy is disillusioned when he tries to use his new rifle. It doesn't work. He hurries home to look for the manual, but he discovers that Puck has stolen it.