general problems of the 2003 Nissan Pathfinder

While traveling at a speed of less than 30 mph in the left turn lane I heard a loud grinding noise that felt like the gears stuck. The car then suddenly and without warning, revved up,speed forward with the steering wheel locked to the right. The steering and brakes were non responsive, and I had no control. My car, at a high rate of speed, crossed three additional lanes striking a telephone pole(actually split the pole in 2 places), transformer, fire hydrant, and finally rolling down a hill where it came to rest in a parking lot. There was fire from the power lines touchin and water gushing from the fire hydrant at the same time. My father was two cars ahead of me and witnessed the entire accident. We had just left from getting the annual emissions checked on our vehicles and had traveled less than a mile towards home, when the accident occurred. I was told by the paramedics that they never saw anyone walk away from an accident this severe. I suffered whiplash, minor cuts and a 2nd degree concussion but this malfunction could have resulted in the death of me or someone else.