As far as movie promo stunts go, this is one of the coolest for the new Avengers. An ordinary BMV X6 was given the Hulk treatment with an unexpected twist; While the Hulk changes when he gets angry, this car changes when hot.
The secret is the heat sensitive color which has been around for quite some time. Remember the color changing Hot Wheels? Same thing, only with a real car.
At first glance, this seems like a normal blue BMW, until the moment you see he inner Hulk breaking trough. It is quite an amazing artwork and its done by the very talented graffiti artist Rene Turrek.