Over 500 mistakes and trivia from more than 70 Christmas movies, many with pictures showing you what to look for. From Home Alone to It's a Wonderful Life, via Elf and Bad Santa, even covering Die Hard and Kiss Kiss Bang Bang, there'll be something about your favourite Christmas film you've never noticed or known before!Home Alone: When Kevin goes to the grocery, he buys Tide detergent. While walking home, the two bags break, but no Tide detergent falls out.Elf: Will Ferrell actually walked down Lincoln Tunnel in full costume, causing several minor accidents.Die Hard: When Hans discovers the first bad guy lying dead in the lift ("Now I have a gun - HO HO HO!") and pushes his head, the corpse is moving his head before he is hit (watch carefully). He also closes his eyes before Hans makes contact.The Muppet Christmas Carol: At the end of the film when Scrooge is going round being nice to everyone, as he's on his way to the Cratchit's house, we see in the background a shop called "Micklewhite's". This is Michael Caine's real surname.The Holiday: When the driver is taking Amanda to the airport at the end, all the dials on the car are at zero, so obviously the car is not moving at all.National Lampoon's Christmas Vacation: Clark Griswold in the attic watching old movies dressed in a woman's turban and gloves to keep warm is not only funny but a reference to the Norma Desmond character from "Sunset Boulevard", who watches her old films to remember her Hollywood glory days.How the Grinch Stole Christmas: After the Grinch unscrews the light bulb in the town Christmas tree, all the lights in the town go dark and the Grinch starts to take off in his sled-thing. When they show a close up of him, the lights are on. Then a few seconds later, the lights are off again.