An xbox eating a disc! Maybe you moved the console when the game was running. If that happens the disc will have a ring on it. Or it may be the laser that reads the disc. It could have something on it.

If your Xbox at it, just wait for it to digest it and it will eventually "leave" the Xbox.

You should feed your xbox daily, no wonder this happened.
But in all seriousness id look on youtube mate.

Okay, no way that happened. Take the xbox apart, it's easy. Then take it out. The odds are the game wont work anymore though.

Well, in the terms and conditions. There was a rule stating not to feed it after midnight. This was your fault for not listening.

if the warranty seal is already missing just open the console then remove the disk tray without breaking anything or send it in for a repair