During the final fight, George Lazenby did the stunt where his character catches fire and goes on fighting himself - only for it to go wrong when he was unable to get his burning jacket off. The take of him struggling is kept in the movie. Lazenby received minor burns to his arm from doing this stunt.
In 1975, this movie's main theme song "Sky High" went to No. #3 on the USA Billboard Hot 100 Chart, No. #9 on the UK Singles Chart and No. #2 on the New Zealand Charts. In 1976 in Japan peaked at No. #2 on the Oricon Singles Chart.
According to director Brian Trenchard-Smith, this movie was the hit at the Cannes Film Market in 1975 and sold to every territory available within just a few days.
This movie was partially inspired by the James Bond films. A number of elements about this movie reflect this: The film's main movie poster was of the panoramic action scene design typical of the Bond movie posters of the period, co-lead star George Lazenby had actually played James Bond in Im Geheimdienst Ihrer Majestät (1969), the villain's lair is a top suite penthouse as was the case in the then recent Bond movie Diamantenfieber (1971), the movie features a key action sequence set around a famous landmark, in this case, Uluru/Ayers Rock, the world's largest rock formation in Central Australia, the hero character has more than one love-interest, a catchy memorable song ("Sky High") features during the credits and was a song not dissimilar to the type of easy-listening Bond Song that had frequented that movie series, whilst the movie also segues into the opening credits at a training camp a la James Bond 007 - Liebesgrüße aus Moskau (1963).
Andre Morgan: This movie's Australian-Hong Kong co-production representative and an executive producer on the picture as a thug.