Xbox 360 Slim Disc Spinning and Console Vibrates while on Dashboard?

Does anyone elses 360 slim have there disc constantly spinning in the disc tray while on the dashboard and it vibrates the console as well? As soon as the game starts up there is no spinning or vibration and/or no spinning disc noise from the 360. Is this even a problem or is it inevitable and they all do it? All my games are installed to the hard drive. I have a 250gb Slim Kinect Bundle. Just curious as I cannot remember from when I had my old 360 PRO 20gb back in the day if it did the same thing.

Mine did it once. I'm not sure what triggered it, but just use the x button and eject the disc and your golden.

Aye mind does this also..If i squeeze the box a little it normally stops..