I thought my car was idling (I ran back into the house for something) when I got back in it, but it was actually turned off. I put it in park and started to back out when I realized it was not idling. It started to roll backwards and the brake did not work. I stopped it from rolling by putting it back in park. Have any of you had this happen? Is this normal? With a hybrid, sometimes it is hard to tell when it's on or off when it was sitting.