When might it be necessary to accelerate with a jerk?

• When you want to test the acceleration capability of your vehicle
• When another vehicle is about to hit you from behind or the side
  Explanation:

  "It may be necessary to accelerate to avoid a crash. This may happen when another vehicle is about to hit you from behind or the side."
• When you need to speed up to reach your destination soon
• Only when approaching a red light