Watch out for those self-cut trees. You never know what you'll find living in them. This black 100% cotton tee from the classic comedy, Christmas Vacation, features Clark W. Griswold Jr. peeking inside his Christmas Tree to discover that pesky squirrel. The red print surrounding him reads "I give you the Griswold family tree." Sticky sap and a broken window were just the tame highlights of his tree ordeal.