A few weeks ago, YouTube group BitMassive brought the world HOME ALONE . . . with blood! It showed us Kevin McCallister's booby traps in a more realistic light, often resulting in some serious blood and gore for Harry and Marv. Well, they're at it again with another classic from our youth and this time around, it's BACK TO THE FUTURE! In addition to the awesome effects, BitMassive also gives fans of the series are much darker (and shorter) ending to the original film. Bring on the red stuff!