Syyn Labs, the folks who created the Rube Goldberg machine for OK Go’s This Too Shall Pass video, recently did a commercial for DieHard featuring Gary Numan performing his classic song Cars on actual cars (their tuned horns), playing them like a piano, all powered by a DieHard battery.

This behind the scenes video takes a look at how the commercial was made – and how you can play 24 cars from a single keyboard.

via makemagazine