Corroded human statue

School monument??? ok, the photos are take by ah wei and edited by me. This picture was taken in our school last year. Honestly I think the first picture is good enough for our own band album photo....haha. So all CHS-ian please go to behind Block E and visit this statue. However of course amatuer like me not really good at this, I don't know how to remove the background cleanly. Any suggestion?