Here's a leaked, 125-page transcript of the brainstorming session that begat Raiders of the Lost Arc: a sit-down in 1978 with Steven Spielberg, George Lucas, and Lawrence Kasdan. Spielberg and Lucas veritably fizz with ideas.
G — What can he chase them with? What if he jumps on a camel?
S — I love it. It's a great idea. There's never been a camel chase before.
L — Is this camel going to chase a car?
S — You know how fast a camel can run? Not only that, he can jump over vegetable carts and things. It could be a funny chase that ends in tragedy. You're laughing your head off and suddenly, "My God, she's dead..."
S — We still have the big fight in the moving truck to do. And now we have a camel chase.
G — We've added another million dollars.
S — Not really. How much trouble can a camel be?
Ignore the introduction, just skip down to the main bit.