See the animal in his cage that you built?
 Are you sure what side you're on?
 Better not look him too closely in the eye...
 Are you sure what side of the glass you're on?
 
 See the safety of the life you have built?
 Everything where it belongs...
 Feel the hollowness inside of your heart
 And it's all right where it belongs...
 [ Lyrics from: http://www.lyricsmode.com/lyrics/n/nine_inch_nails/right_where_it_belongs.html ]
 What if everything around you isn't quite what it seems?
 What if all the world you think you know is an elaborate dream?
 And if you look at your reflection, is that all you want to be?
 What if you could look right through the cracks?
 Would you find yourself... find yourself afraid to see?
 
 What if all the world's inside of your head?
 Just creations of your own...
 Your devils and your gods and the living and the dead
 And you really are alone
 You can live in this illusion
 You can choose to believe
 You keep looking but you can't find words
 Are you hiding in the trees?
 
 What if everything around you isn't quite what as seems?
 
 What if all the world you used to know is an elaborate dream?
 And if you look at your reflection, is that all you want to be?
 What if you could look right through the cracks?
 Would you find yourself... find yourself afraid to see?