Need a mentor to jolt your thinking—or need to lock yourself away from the world for 20 days?

A whole new generation of startup accelerators has proliferated in recent years, each one promising to turbocharge a founder’s ambitions. Many of the best are from the most prominent names in Silicon Valley, including Sequoia Capital, Andreessen Horowitz and investors Nat Friedman and Daniel Gross. But that’s not the case for all of them—just ask Dave Fortenot, founder of the very well-regarded HF0.

For his program, Fortenot looks for founders with a “fire in their eyes,” he says. He likes to find people who’ve considered this question: “Have you thought about trying to stop Elon?”