The term "side impact" refers to an accident or collision that occurs on one side of a vehicle. This can include collisions with other vehicles, objects such as trees or poles, or even rolling accidents where the vehicle leaves the road and hits something on the side. Side impact crashes are particularly dangerous because they often involve the occupants' heads being struck by the side windows or other hard surfaces within the car. As a result, these types of collisions can cause severe injuries or fatalities.