Four years after Terry Ho opened a handful of hibachi fast-casual restaurants in his home state of Georgia, a customer mishap sparked a new family business, a sauce company, Terry Ho Products LLC, that now brings in over $25 million in revenue a year.

Ho’s customer wanted a 32-ounce cup of the Yum Yum Sauce he served in his restaurants, a concoction he invented years earlier in the kitchen of a fine-dining restaurant he once owned in Albany, Georgia. The woman dropped the cup, spilling sauce on the floor. For Ho, it was an aha moment: He needed to bottle the sauce.

“We had thought about it before,” he said, when other customers requested cups of the sauce to go or brought their own containers. “But this pushed me over [the] edge. I thought, ‘There’s got to be a better way to do this.’”

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