I was driving on an on ramp going pretty darn fast with someone in the passenger seat, and when I got towards the bottom adn started to speed up more, my parking light brake came on.... and stayed on until I straightened up. Anyone have any idea what this might be? I have 74.5k miles on the car. Also, the rear brakes have started to squeal the first few stops really loud. Does this mean i need to change them, or that there is something wrong? That light freaked me out!