This is the dramatic moment a motorbike rirder rescued two elderly passengers who were trapped inside a crashed car with smoke billowing from the engine.

The motorcyclist named Zhang, 24, was travelling along the G318 National Highway near Zogong County, in Tibet, when he saw the white SUV skid off the tarmac at around 12:30 pm on September 14.

Zhang's helmet-mounted camera captured the moment he stopped by the side of the road and approached the overturned vehicle to help the people inside.

The video shows him trying to peel off the smashed windshield. After confirming that there were no other ways to get inside, Zhang asked the two men trapped inside: 'Should I tear the glass?'

Zhang was wearing thick gloves, so he used them to grab the crack in the car and forcefully pry the glass open, creating an escape route. He beckoned to other passing travellers, and one man came and helped him remove the glass so they could reach the trapped passengers, all the while with smoke coming from the crashed vehicle.

The driver stepped out with a visible bleed on his head while more strangers gathered to offer help. Zhang then managed to free the front-seat passenger from his seatbelt and helped him carefully step out of the wrecked car. They all moved further away from the overturned SUV, apparently fearing an explosion as the vehicle began letting out smoke.

The young motorcyclist later told how he witnessed the entire process of the car in front of him overturning.

He said: 'When the car was going around a bend, the driver didn't turn the steering wheel, and there were a lot of small stones on the road, so it skidded off.'

He added that his first reaction was to pull over and immediately rush to the scene to help, and the camera he was wearing on his head recorded the entire process.

Zhang said: 'It was my first time encountering something like this, and I was quite nervous.'

After confirming that emergency services had been called and were on their way, Zhang left the scene and continued on his journey in Tibet, an autonomous region of China.