Typically, a rear-end accident happens when the front of one vehicle collides with the back of another vehicle. These types of accidents often end with injuries. Commonly the injuries occur to the shoulders, back, knees, neck (whiplash), head (concussion), face, and at times, the crash is bad enough to cause a wrongful death. In most rear-end car accidents, there are only two cars involved. However, there are sometimes many more vehicles involved. Multi-vehicle collisions involve three or more vehicles. It may be critical to contact a Laguna Hills rear-end accident lawyer about how to handle multiple car collisions.