This is the frightening moment two cars collide on a motorway in south-east England.

In the video, which dates from August 2014, a driver of a green Volkswagen Golf driving southbound in the middle lane of the M20 between Ashford and Maidstone skims a lorry driving in the inside lane.

The male driver of the Golf overcompensates, spectacularly losing control before slamming into a central reservation at speed and then colliding with the driver of a Renault Grand Scenic coming up behind.

The incident was captured on a pair of SunnyCam video recording glasses by the Renault driver, Stephen.

He ended up having weeks of physiotherapy on his shoulder as a result of the accident.

“Five seconds to make a decision,” Stephen wrote on social media of the incident. “I hit the brakes as soon as I saw him hit the lorry."

Stephen adds: "I had to make sure what was around me at the time and look at the Golf and make a decision in about five seconds.

"Obviously, as we drive we take note of our surroundings but I had to make sure other hadn't taken any action that could create even more trouble.

"In the time I had, I did the best I could.”

+MUTE FROM SOURCE+

Accident on the M20, filmed sometime in August 2014