Julian McMahon was once married to Kylie Minogue's younger sister, Dannii Minogue.
Julian McMahon is the son of the former Australian Prime Minister, Sir William McMahon.
The whale removal scene bares striking similarity to a 1970 real life event that saw a local government in the USA (Oregon state Highway Department) attempt to remove a whale carcass by blowing it up with dynamite, which sent rancid chunks of whale raining down on spectators (also caught on camera).
Originally there were five families in the script, until actor Guy Pearce pointed out that so many characters were just too confusing. The final script settles on three families to base the story around.
The original title, "Flammable Children", was a sticking point with the film's backers who were worried it would be perceived as a horror film. However writer/director, Stephan Elliott, stuck to his guns on the matter. The film was on it's final stages (with even a title card) when the Grenfell Tower fire happened in the UK tragically taking the lives of many children, Elliot relented and the title was changed for most territories although some countries still retain the original title.