When a vehicle rolls, unbelted occupants are violently tossed around like rag dolls and are often ejected through a window. The results can range from severe lacerations to paralysis and even death. Wearing a seatbelt reduces your risk of being injured or killed in a crash by as much as 50%. and the primary function of headrests in vehicles is safety: they're made to reduce whiplash, an unpleasant side effect of the rearward movement of the head and neck that occurs during a rear impact.
