There are some cars that just shouldn't exist, and yet they do. Cars like the fantastical Lamborghini Countach, or Dodge's neo-Cobra, the venomous Viper, seem to be too eye-popping, jaw-dropping, and incredible to be anything more than a wishful dream of some automotive graphic designer. Yet, they have come, gone, and in the process inspired millions of men's, women's and children's driving tests. BMW has also made plenty of exciting cars over the years, though most of them like the incredible E30 and subsequent M3 were, and are, more production cars that don't garner quite the same reaction as say, the too-crazy-to-be-true i8. But, when Bimmer decided to bring to life a real-life version of their Z07 concept car from the 1997 Tokyo Motor Show called the Z8, the world was never the same.