Have you tried any of these methods?
Open Disk Utility (in the Utilities folder of your Applications folder), select the disc, and choose File > Eject.
Choose Apple menu > Restart and hold down the mouse or trackpad button until the disc ejects.
If your drive has an emergency eject hole, put the computer to sleep and insert a large, straightened paper clip in the small emergency eject hole of the drive (the location varies, depending on the drive). Push firmly until the disc ejects.
If all other methods fail, you can try to eject the disk using the firmware. (This may not work on all computers. For example, it does not work on Intel-based computers.) The steps below describe how to start up and briefly use the computer with only the firmware loaded, not the standard Mac OS X interface.
My way of joking is to tell the truth. It is the funniest joke in the world. -G.B. Shaw