I was reducing my speed as I approached a stoplight, and my vehicle rapidly and aggressively increased in speed. It made a revving sound and lurched forward, causing me to rear-end a truck. There is no possible way that this was human error and it was terrifying. The person who I rear ended mentioned that the impact felt like a double impact, as if I was continuing to accelerate after he was hit. I have requested the data from the accident time period from Tesla. An insurance representative is organizing an inspection. This was the second incident where the vehicle lurched forward on it's own. The first one happened about six months prior when I was at a complete stop. It did not cause an accident but it did frighten me into an audible scream. I did not report it because after some basic information gathering, I decided that it somehow must have been human error. Every claim I've seen has had the outcome of user issue. During both lurching incidents, a revving sound was made and it felt like and electrical surge of some sort. I am extremely clear on the fact that I did not cause the vehicle to dramatically crash and I feel helpless to know that it will likely be ignored by Tesla. What if I had been in front of a cross walk when the vehicle surged and lurched forward and a life had been seriously injured or even taken? Something must be done to expose this issue and get to the bottom of it. I am happy to provide any additional information in order to prevent this from crea