My daughter has been playing multiplayer for a few hours so I decided to match her level and sat down for a marathon session. I played a few Infinity Slayer matches and then decided just go down the list. And haven't played since. No matter what I select something odd happens: the match will load, the beep countdown starts only for me to get returned to the Halo 4 (Press start) screen. No errors messages, I just returned to that screeen. This has just started. My girl played fine with no problems for two hours! Then suddenly I can't do anything! But to be fair, I got a brief "disc needs cleaning" type message right after I finished the last Infinity Slayer game so I did wipe it off and it does not appear to have major scatches. Any ideas?