Algodoo

Cute scene!

But minor glitch: The dominos randomly fail to fall down. It happens sometimes around 20 meters, or 40 meters, or 50 meters. I haven't yet figured out what causes this, or how to prevent it.

I knew it did that, but originally decided to keep it in because I thought it was interesting. I recently changed the scene so it shouldn't happen. What was happening was the domino falling wave was slightly faster than the car and the wave finally caches up to the newest domino at which point the wave may or may not stop. I changed the car motor from 110 to 115 RPM so the car should be slightly faster than the wave.

Yup, works good now without fail!

(I once had a nightmare where I was being chased by an infinite chain of dominos, like the one in your scene. Kinda gives me the chills! )