My ex-wife.
A quote from Iron Man II comes to mind...
Justin Hammer: These are the Cubans, baby. This is the Cohibas, the Montecristos. This is a kinetic-kill, side-winder vehicle with a secondary cyclotrimethylenetrinitr amine RDX burst. It's capable of busting a bunker under the bunker you just busted. If it were any smarter, it'd write a book, a book that would make Ulysses look like it was written in crayon. It would read it to you. This is my Eiffel Tower. This is my Rachmaninoff's Third. My Pieta. It's completely elegant, it's bafflingly beautiful, and it's capable of reducing the population of any standing structure to zero. I call it "The Ex-Wife."