The SPAC was trying to take a YC company, Momentus[1], go public: "In November 2019, a special purpose acquisition company called Stable Road Acquisition Corp.

The SPAC was trying to take a YC company, Momentus[1], go public: "In November 2019, a special purpose acquisition company called Stable Road Acquisition Corp. went public, raising $172.5 million from investors to merge with a company to be named later... Stable Road’s sponsor Brian Kabot met Mikhail Kokorich, the founder of a company called Momentus Inc., which makes plasma space rockets... Anyway Kokorich talked a good game about his plasma space rockets, and Kabot had $172.5 million burning a hole in his pocket, so a deal was struck." 1. https://www.ycombinator.com/companies/momentus https://www.ycombinator.com/companies/momentus