There's not a mark on it. How did you do that?
4 seconds sound clip from Knight Rider - Knight of the Phoenix (S1E1-E2).
You can hear this line at 00:19:35.920 in the Blu-ray version of the episode.
Quote context
[...]
- Boy, those guys did a nice job. There's not a ripple on it. Like a mirror.
- It's not paint. It's a finish bonded into the molecular structure of a new substance.
- It's not metal, and it's not fiberglass. Excuse me.
- Here. Strike the surface as hard as you can.
- Come on, Devon. I'm not gonna hit my car. It's beautiful. Hmm.
- There's not a mark on it. How did you do that?
- Don't just stand there with your mouth open. Get in the car. I'll show you.
- Welcome aboard the Knight 2000.
- What's all this? Looks like Darth Vader's bathroom.
- It is a one-of-a-kind car, Mr. Long. It is the fastest, safest, strongest car in the world.
[...]