This Christmas Vacation t-shirt features an image of Clark W. Griswold wearing a Santa Claus hat. The shirt includes Cousin Eddie's quote "You Serious, Clark?" Eddie asked this question after Clark tried to get the kids excited for Santa by telling them "Hey, Kids, I heard on the news that an airline pilot spotted Santa's sleigh on its way in from New York City." Christmas Vacation is widely regarded as one of the greatest holiday movies of all time. Let everyone know that you are a fan of the 1989 classic starring Chevy Chase with this You Serious Clark National Lampoon's Christmas Vacation T-Shirt!