M3 - Pricelss

The car appears to be going fast enough to lift off over some of the undulations in the road. I think he did this over the bump just prior to the last corner and lost traction at the front wheels inducing  a loss of steering and a trip into the scenery.

His steering technique would also appear to be based on driving a playstation or an xbox rather than a high performance car. His hands are too high on the wheel and his steering inputs are made by rolling his shoulders and upper body from side to side. This is made worse by the fact he is leaning forward unsupported by the rear of the seat and using the steering wheel to brace himself against the movement of the car.

I am not surprised he lost control and apart from wrecking someones BMW he is lucky no poor sod was travelling in the opposite direction.