You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Under-running may involve: and explain in detail?
Under-running/ tail gating Tail-gating occasionally occurs with cars driving into the back of large trucks. In such case, the windscreen and front of the passenger compament are smashed with severe injuries to the head and in some cases decapitation of the occupants of the front seat. Also seen where the motorcyclist drives under the rear of the truck, causing head injuries and even decapitation.