A flash mob performed Fiona Apple's Hot Knife on an Italian metro. Fiona and puppy enjoyed watching Martina Vinci and UGA's rendition of her song on a friend's computer. Watch the original Flash Mob at    • FLASH MOB METRO [Hot Knife] • martina...   Watch Fiona's version of Hot Knife at    • Fiona Apple: “Hot Knife” (Official Mu...