Don't ho-ho-hold back your excitement, kids -- our friends at RiffTrax are back with their festive holiday giveaway, the 12 Days of Riffmass Sweepstakes! RiffTrax (the former Mystery Science Theater 3000 guys) and Fathom Events bring you the return of 12 Days of Riffmas, their celebrated contest that could win you any one of several prize packs.