Yikes! I've been a lurker for quite a while now, but I just had the EXACT same experience happen to my (late) 2013 Fusion Energi with ~8500 miles on it. Car freaked out from a near idle, began accelerating on it's own, and I brought it to a stop from ~40mph using the brake... then subsequently re-accelerated after I let off the brake and got up to ~40mph again when I stopped it again, pulled over, turned off the car, and re-started it. All error codes were still illuminated, but the car was drivable. I took it straight to the nearest dealership where they were scrambling after I told them what happened (and said it was impossible, but nothing surprises them anymore). They did the 14-0020 TSB update and I drove away. I also note that this isn't a pedal-to-the-metal acceleration... it's a slow and gradual acceleration on it's own. ~Andrew