*ahem* The condition called “Holiday Spirit”, colloquially called “That warm and fuzzy feeling”, is usually caused by doing nice things for people or hanging up holiday decorations. The repercussions are few, but this is generally thought to be dangerous. Thinking about people other than yourself is quite dangerous, as it may cause you to become unliked and lose friends. You may even lose your job. The treatment is easy enough. Say “Bah Humbug” three times before you get up, ignore your neighbors and shop on Amazon for yourself, then call me in the morning. Side effects may include family members giving you glares, empty-pocket syndrome, and recurring dreams about ghosts of Christmases past.
Edit: Ghosts like the Doctor, that is! *Eight’s facepalm* “But…it’s a new twist!” A Christmas Carol is never new. NEVER! ARRRGH! All right, I think I’m done ranting.