This 2012 M5 was traveling at a top speed (approximately 190mph/300kmh) and lost control of the car as the driver braked for a car joining the highway. The driver of the M5 swerved to avoid the incoming car which merged too aggressively, hit the divider and bounced off eventually ending up on the grass at the side of the A81.
The 60 year old driver, 20 year old passenger, and a dog were all seriously injured, but are alive. Judging by the severity of the damage to the car, it's a testament to the M5's safety technology that no one was instantly killed.
The M6 and M3 on the scene belong to the M5 owner's sons, who were traveling with the M5 at the time of the accident. The car which cut off the M5 did not stop and fled the scene of the accident.
It's easy to forget sometimes just how much power our BMWs have and while they are some of the safest cars in the world, we are all still human, capable of suffering injuries and making driving mistakes (or simply suffering bad luck). So please be safe out there!