I hit the power button on the freeway in rush hour traffic 65-70mph trying to go to hold mode. After only 3 weeks with the car, I'm glad to see I'm not the only one. The worst part is that when I hit the power button to turn it back on, I could barely get the car to maintain speed. I had to pull off on the shoulder, put it in park, turn it off, and restart for it to drive correctly again. I thought there would be some sort of failsafe to prevent this at speed (or at least restart and work again). Most quirks are fixed by the last year run of a model (I have a 2015 Premium).