I was in a parking lot, seated in the back, driven by someone who's not very familiar with the vehicle and a passenger who's no better than the driver with the car. We were going at a parking-lot-cruising speed. Suddenly, a passenger pressed the engine start/stop button thinking it was an emergency blinker button... I got upset but oh well, the irony... I got something to post here... the car seems fine.

Anyway, what happened; the engine actually got turned right off and the transmission went immediately into park but the car still rolled like it was cruising in Neutral. I'm not sure if the steering was still powered or the brake was as effective, since I wasn't driving.