Ashlee Fidow genuinely kicked Uli Latukefu in the ribs during their fight scene, when Uli didn't move out of the way in time.
The Tongan song heard during the opening title sequence was written and composed especially for this film.
The script was changed to make Fritz an Australian character, after Uli Latukefu was cast. This was done to explain why Fritz did not speak with a New Zealand accent.
The wrestling ring used in the BBQ scene was not a standard wrestling ring and had no give. Michel Mulipola said his knees and body were banged up after taking several bumps on it, for the filming of his scenes where he performs the "frogsplash" maneuver.