After about 9 months in my Model S, this might be the last question I really have. What exactly happens if I am driving 60 mph and push the button on the stalk to put it in park? I like to think it is disabled if the car is in motion, but I did an experiment going maybe 5mph and yep it slammed on brakes stopping with a lurch. I ask, because the button to squirt the washer fluid is... a button on the end of a stalk, just on the left side. Every time I wash my windows I feel like I am risking my life if that is the day I get it scrambled. Can anyone confirm it has a safety interlock to prevent the parking brakes from engaging at speed? I seem to recall some people saying that is a feature, since it is similar to engaging a parking brake or handbrake.