“Why do you wanna fight?” says Adrian. “Cause I can’t sing or dance,” replies Rocky. Perhaps this exchange epitomizes the reason for the classic boxing movie’s success and overwhelming cult status. It provided a cinematic classic for a largely male audience who needed a hero; one that wasn’t heroic because of his moon walk or falsetto, but for his fighting spirit. With a budget of $1 million, Rocky notched up an impressive worldwide gross of $225 million, giving a percentage return of over 11,000%. Knockout.