Geeky amusement

At the command prompt on Linux/Unix/Cygwin/etc make a file called mouse and put this in it:

                _ |\_
                \` ,,\
           __,.-"  =Y=
         ."        )     
   _    /   ,    \/\_     ) __QQ 
  ((___(     )_-\ \_-`   (_(_)_">
  `-----'`-----` `--`       " "

Now when you say cat mouse, that's exactly what you get.

Edit: Guess what this does:
cat mouse | cat mouse -