It's a truck. It's a van.

A new video shows a car getting confused by a carriage being pulled by a horse.

The electric vehicle's self-driving software can be seen struggling to deal with a number of wrong guesses, ranging from a van being followed by a pedestrian to a backwards- driving semi truck.

It's not clear who was in charge of the video that was filmed outside of Switzerland.

The video is an excellent example of artificial systems struggling to come up with an explanation for unusual edge cases, and shows just how difficult it is for a driver assistance software to visually interpret and account for the vast range of things that can happen on public roads.

"I wonder how many carriages the model has seen during training," said the co- founder of the company.

Under Scrutiny

A number of videos have shown the feature acting erratically.

The company is being investigated by US regulators over reports of accidents.

The development of a driver assistance feature advanced enough to take care of all driving has been a challenge for the company. So far, all of its systems require the driver to keep an eye on the road, and in June of this year, the company cut 200 jobs related to self-driving cars.

The head of the company's artificial intelligence department left last month.

It shouldn't come as much of a surprise that the system didn't know how to categorize a horse-drawn carriage, and that it needs to be fixed.

There is more on autopilot.