The car crushing is probably brutal, and unless we start seeing every iPhone 6 owner trying run over their phones, and say "Look, i could it scratched",, it will stand up to *almost* anything.
What we are probably asking Apple is, "I want my phone to be indestructible" Not going to happen.
As an aside, here's a humorous NY Times story from 2005 where the reviewers repeatedly run over a Vertu Ascent phone with a Porsche Boxster.
(Vertus have always had sapphire screens, and before Apple grabbed up the rights, they used a LiquidMetal chassis.)