I have seen un-intented Acceleration (Score 1)

Many years ago my brother and I were using the cruise control on a 1978(?) Chevy wagon. Life was good until the car began to accerate! (fairly slowly) Now since my brother who was driving happened to be very familiar with automotive electronics (Wrote section 8A) of many GM manuals etc.. We found this fascinating. In any case we let the car accelerate to about 80 from ~55 (Mom was in the car otherwise we would have let this go further . We just disengaged the cruise when we had enough. It never did happen again.