I have a video of me here, backing up. I didn't have it in reverse. It was in neutral and on a hill. While rolling backwards if i hit the brakes it makes a clunking sound. The weird thing is that it doesn't do it while I am driving forward. I don't know if it has something to do with the brakes or the ball joint, or some kind of bushing. In the video, i keep pumping the brakes, that is why you hear a pretty rapid clunking sound. I would love to get this fixed soon, let me know what you guys think.

http://s1235.photobucket.com/albums/ff429/xxsoccerguy55xx/?action=view¤t=video-2012-01-07-15-44-50.mp4