I believe many people have the same problem that when they move their console while there is disc spinning in there, it gets the disc scratched by the drive and gg.....there goes your game disc with a huge scratch. So, I happened to be one of those who moved the console while playing games and my disc got this scratch. I went to game crazy today and have them buff my disc for me, after twice of buffing, half of the scratches were gone( it was a circle, now its a semi-circle)....so I was quite satisfy with the result and go home to continue playing my game. it happens at the end of the game where I was watching ending and it shows up that xbox cant read the disc. I wonder if the disc like that is broken and not playable anymore? should I go buff it again to see if I can get rid of that half of the scratch? if I install the game onto the hard drive...does it work?