SFGate first reported that a self-driving car from the company Cruise found itself stuck in a patch of wet concrete while traveling through the city’s Western Addition neighborhood yesterday. Paul Harvey, a resident of the city, told the outlet that there were no passengers in the car as it remained lodged in the pool of cement at a construction site. The car was reportedly rescued later on by a group of Cruise workers.

“I can see five different scenarios where bad things happen and this is one of them,” Harvey said, as quoted by SFGATE. “It thinks it’s a road and it ain’t because it ain’t got a brain and it can’t tell that it’s freshly poured concrete.”

Cruise did not immediately return Gizmodo’s request for comment on the incident.

Last week, Cruise ran into some trouble with some of its other vehicles. Around a dozen of the company’s cars came to a standstill on a busy San Francisco street with hazard lights flashing, creating a traffic jam as seen in many videos posted to Twitter. The company replied to one tweet, claiming that a local music festival was hogging up the mobile bandwidth the cars needed to operate.

“A large festival posed wireless bandwidth constraints causing delayed connectivity to our vehicles,” Cruise wrote in a tweet. “We are actively investigating and working on solutions to prevent this from happening again. We apologize to those who were impacted.”