Every once in a while, I'll drive off in our car and I'll feel this strange lurching sensation. You see, my wife is big on using the emergency brake, and she will often remember to put it on. I will often forget to put it on. It's just not part of my car starting ritual to turn off the emergency brake because I don't usually engage it. So here I am driving off with the brake on and lurching all around. It is a good idea to release the brake. It is hard to go the speed you want when the brake is holding you back.