http://photos-g.ak.fbcdn.net/hphotos..._7957723_n.jpg
Let me know if it worked for you. I'm going to do it and once I do I'll post my own feedback.
Note: I'm pretty sure you don't have extra pin pong balls lying around, so try covering your eyes with other things that would do the trick; just make sure you are completely blacked out. Maybe a bandanna?
Sarah