The New Zealand team was poisoned before the final
Rory Steyn the, then bodyguard of Nelson Mandela, wrote in his memoirs that the New Zealand team was poisoned by a waitress named Suzie, to enable South Africa to win the world cup. Check this from The Telegraph:
http://www.telegraph.co.uk/sport/rugbyunion/4750515/Mandela-book-stirs-rugby-poison-riddle.html
or this:
http://www.iol.co.za/index.php?set_id=6&click_id=581&art_id=qw961136822629B262
Not such a great feat after all.