Solution For: Macbook Black Screen And Cursor Is Still Visible

I was reading the Google Blog a few minutes ago when suddenly my MacBook screen turned black. 😕 The cursor was still visible and I could move the cursor across the screen.
If I put back the lid, the light glows and if I open the apple logo keeps glowing but the screen is still black.

The only thing possible now was to reboot. I used: Command C + turn off button.

I searched across the web on various forums for a better solution to this, but haven't found any.

If you happen to know a good solution to avoid/prevent or recover from this, please share.