The driver left the steering wheel to sleep.

The driver, looking tired and sleepy, yawned with one hand covering his mouth while looking out the window at the car at a fairly high speed on the highway. The main character then lifted the suitcase stuffed on the accelerator, adjusted the steering wheel to straighten it, and crawled into the bed in the back to sleep. The camera then turned back to the window where the scene passed by quickly, focusing on the empty steering wheel and the suitcase on the accelerator. But when the camera turned straight to the road ahead, the truth was revealed: the car was actually being towed by a tow truck, not driving on its own.

According to VNE