Passenger Mike Johns says he got into the driverless Waymo taxi to take him from a car rental drop-off to the airport in Scottsdale, Arizona. All at once, he says the taxi started going in circles right in the parking lot.

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.”