So i was driving and i raised my passenger window. All the sudden I hear this sound like someone hit my car with a coconut on my passenger door. Thought maybe the window motor blew up or something. The window still goes up and down fine. Door locks and unlocks. There is something definitely rattling around in there tho so something broke. What the hell could it have been and how long before catastrophic failure? Anybody have instructions for taking the door apart?