Pedestrians had to leap out of the way of the cars and other motorists had to 'swerve violently' to avoid crashing.

This caused the car to swerve violently in a zigzag.

The terrified passengers were thrown about when the coach swerved violently towards the verge.

But the study also found that 4x4s were more vulnerable to turning over after hitting objects such as kerbs or when swerving violently.