A pregnant woman in San Francisco gave birth Monday night inside a Vemo robotaxi en route to UCSF Medical Center, marking the latest milestone in the driverless car saga that no one saw coming—except for everyone with more than six months of experience behind the wheel of a ride-sharing vehicle.

According to SF standardVemo’s remote team detected “unusual activity” and called 911, even though the vehicle beat emergency services to the hospital.

Some traditions seem immune to disruption. For decades, expectant mothers have raced against biology in the back seats of taxis and Ubers from London to Los Angeles. In India there was a mother who Named his son Uber After giving birth to her on the way to the hospital (allegedly the driver assisted in the delivery). In 2017, there was also a California couple who welcomed their baby in an Uber During Shabbat. (Ah, though, they could have been!)

The stories continue. Now, Silicon Valley has automated the experiment, at least in part.

The vehicle was immediately towed to San Francisco for cleaning. What’s more, this wasn’t Vimo’s first birth — the company told the Standard that the Phoenix baby got there first. “Although this is a very rare occurrence,” a Vemo spokesperson deadpanned, “some of our newest riders just can’t wait to experience their first Vemo ride.”