We generally think of whiplash as the result of a car accident. As you can see in the picture below, when you receive an impact from behind, your head and neck move from a central resting position into a sudden acceleration/deceleration motion which, takes your neck first into hyperextension and then into hyperflexion. However, whiplash can also develop from a number of other causes, such as during sports (for example diving, swimming, rugby, boxing, horse riding, snowboarding) or from a fall.