Move over, Silent Night, Deadly Night! Here's a fun trailer for the 1988 Brit Christmas slasher movie, Don't Open Till Christmas, starring no one you've ever heard of as a psychopath who goes around brutally murdering fake Santas! Phew, luckily cult horror film star Caroline Munro (playing herself) stops by to lighten things up with a bouncy musical number. (Quick, Santa! While the murderer is distracted, sneak out the back!)

If you love it? The entire thing's here.