Scenario: Heading south on 4 lane highway in the left hand lane. Highway generally flat with no obstacles...clear eye view as they say. Traffic volume light, ACC set to speed limit - 45 mph. ACC distance bar is set to one. Burgundy Subaru Forester at 1 o'clock off right front bumper running speed limit. Just enjoying a beautiful day looking forward to the golf outing I am heading to. A young lady in her twenties driving a Element/Soul type of vehicle pulled out of a driveway off to my right...and into the path of both cars. The "BRAKE" light came on...alarm came on...all the while I am doing my best to put my foot through the floorboard via the brake pedal. Squealing tires, alarms, anti-lock brakes activated. etc...looking at the driver and then the passenger...passenger saying...quick lets get out of here...driver floors it and on her merry way. That's how close I was to her vehicle. This took all of 3 seconds. I just wonder if she will ever understand how close she came to a disaster...probably not. All I can think of? What if it was someone else who was more interested in their cell phone than paying full attention when driving a 4000 lb missile was behind the wheel? Would the "Braking" function have stopped in time? My gut says maybe because it appears to have activated full-on instantly...right about the time I hit the pedal. Still... Point of the thread...ACC/Brake function worked like a charm albeit I was only a split half-second behind burying my foot through the floor. The Clarity and Honda safety sense functioned as designed. Especially thankful no vehicle was immediately behind me...on the cell phone. On the lighter side...I probably countered all the regenerative braking I do to save wear on the brakes in this one instance. Oh well. lol The Subaru Forester pulled off the road and was still sitting there when it disappeared from sight in the rear view mirror.