Eighteen years later, it still gives me a jump scare, even though I know it's coming.
Agent Mulder, hot on the trail of a group of murderers who are harvesting their victims' organs, breaks into a makeshift laboratory in an attempt to save an abducted woman. He finds a gruesome scene of bodies on ice and surgeons, scalpels in hand, preparing to transplant the villain's head onto the abducted woman's body. Mulder turns and — there it is! The villain's severed head on ice! And it opens its eyes.