He had a plane to catch — but his ride to the airport was stuck in a parking lot, driving in circles. That was the experience of a passenger using Waymo, the Alphabet-owned autonomous taxi service that launched in San Francisco last year and has expanded its fleet to Los Angeles and Phoenix.

A Los Angeles tech entrepreneur found himself trapped in a self-driving taxi last month on his way to the airport, with the car repeatedly circling around a parking lot. Mike Johns posted a video on LinkedIn in which he was headed to Sky Harbor International Airport in Phoenix.

Waymo, which is owned by Google’s parent company Alphabet, told Gizmodo the rider wasn’t charged for his trip and has attempted to contact Johns but they haven’t connected yet. Waymo also emphasizes the circling lasted about five minutes. Johns told ABC15 Arizona that he was frustrated by the experience and “It’s like people are the experiment.”