This past summer, Sophia Tung set up a livestream of self-driving Waymo cars honking from the San Francisco parking lot near her apartment all hours of the night.

As if trying to make amends for this, Waymo threw an ice cream party in Tung's building and gave Tung, a software engineer, some promo codes redeemable for free rides.

The outfit may have underestimated her. Having given out a few codes to friends, Tung learned – after realizing her codes were not capped in value – she would use her last one to ride for 24 hours in Waymo, visiting the tourist destinations like Golden Gate Park, Chinatown, and Twin Peaks. Alas, 83 miles and 6.5 hours later, her Waymo ended the ride with 20 miles left, cutting short her plans.

It was probably for the best. Said Tung as she tried to get feeling in her legs after the long ride, which ended back in her neighborhood: "Six hours and 30 minutes; I'm never doing that again."