 Accelerated on it own.  Could have killed someone or have been killed.  Noticed early on that if I left in running in the driveway it would accelerate while in park.  Just thought it was a idiosyncracy  of the car.    What really got me is the first thing Nissan asked was how OLD was the driver.  Then within a few hours after reporting the incident I got a call from a Nissan salesman suggesting I by a new car.  How tacky.   We were still in shock that this happened.