Big Al Mayo did an AWESOME job of modeling this car, http://www.youtube.com/watch?v=IfEePd6pdW4 I wish I had those kind of skills.
I think I saw it on Railpicture , if I am not mistaken it's a whale . I will try to locate the picture . edit : my mistake , it's a BNSF car that was done both side : http://www.railpictures.net/viewphoto.php?id=292787&nseq=0 http://www.railpictures.net/viewphoto.php?id=273847&nseq=1