One opportunity triggers another. And then another. That's a rifle-shot opportunity burst. But if one opportunity triggers ten others and those ten others after, it's an explosion that cascades wide and fast. Some seized opportunities burst completely laterally, multiplying to the hundreds of thousands in the first generation--and then dry up immediately. Think of the pet rock. Sure, it sold in the millions, but then what? There was no opportunity cascade. The way to determine the likelihood of a cascade is to explore the question: How many other technologies or businesses can be started by others based on this opportunity?