He also competed at the Australian Youth Olympic Festival in 2003 , finishing sixth .
As a trampolinist , Mitcham represented Australia at the World Junior Championships in 1999 and 2001 , winning the double mini-tramp event .
Mitcham also competed at the Australian Youth Olympic Festival in 2003 , finishing sixth .
As a trampolinist , Mitcham represented Australia at the World Junior Championships in 1999 and 2001 , winning the double mini-tramp event .