I can't imagine how that could happen. Sounds like a computer problem. I remember years ago I was going down the road with cruise on and the speedometer cable broke which because it thought it was slowing down, it accelerated full tilt until i hit the brake. I would get it to a dealer.
Ron & Charlotte
WD8CBT since 1976
32' Gulfstream Ameri-Camp & 05 Ram QC LB
I started with nothing and I still have most of it left
I never fail, I just succeed in finding out what doesn't work