It's an Easter Egg but Really it's a Christmas Party Trick
The new Tesla Model X, their 2016 SUV, has a pretty cool trick which is not even an option.
It's a pretty cool addition to the car's computer system (an Easter Egg as they call it - a hidden message or feature added by software developers when creating new software, and not always known).
I suppose when you are spending this kind of money on a car it should have something special. Read more about the Tesla's tricks on Gizmodo.