On my way home from school, I was going over the same hill I go over everyday. Today when I reached the top of the hill, I had to stop for the stop sign. As I started braking, the break pedal was like bouncing and like a hard banging noise started. I was only a block away from home so I just went there and looked at my car. Everything seemed alright, but then again I don't know much about cars. Is this something I should be worried about?