Like most movies released in Hong Kong during that time, its original soundtrack is dubbed in Mandarin, not Cantonese. The Cantonese soundtrack was dubbed years later when Cantonese became the predominant language used in the Hong Kong movies in the 1980s.
In the cat fight with the cobra scene, as the cat emerges from behind the wooden ladder, a twine tethered to the cat is visible. As the cat tries to run away, the twine stretches taught. This might explain why the cat would stay and fight the cobra, rather than run away. This would not be the first time a tethered animal is forced to fight a cobra in Hong Kong kung fu films, as a monkey is seen tethered in the animal fight scene in "Shaolin Drunken Monk" (aka "The 36th Chamber: The Final Encounter"), starring Gordon Liu.
The combination of comedy, martial arts, stunts and acrobatics had been done before, in Chia-Liang Liu's 1975 film, Spiritual Boxer. However, the release of Snake in the Eagle's Shadow heralded a new direction for Hong Kong action movies.
Several of the training scenes in the film were duplicated in the Namco Playstation version of "Tekken 3" for character Lei Wulong's ending movie. These duplicated scenes in CGI include the Egg Maze training and the Filled Waterbowl training.
First film in which Siu Tin Yuen appeared as a wandering eccentric kung fu master. He would later on reprise the same character type in different kung fu films one of which is _Drunken Master (1978)_ which also features 'Jackie Chan' as the leading character, Dean Shek as a bumbling assistant teacher and Jang Lee Hwang as the final opponent.