In some cases, negligence is the underlying factor in an accident. Either the motorcyclist was not properly handling his motorbike or the driver was not handling their automobile correctly. In other cases the motorbike itself could case the accident. This kind of accident would fall under product liability. The motorbike that the cyclist was using may have a manufacturing defect that caused the accident. If the design flaw has rendered the motorbike unsafe or unusable on the road, then the product itself could be the cause of the accident. Each situation varies, calling for an inspection of both the motorcyclist and his bike, and the driver and their automobile.