Dance of the Drunk Mantis Chinese is a 1979 Hong Kong kung fu comedy film directed by Yuen Siutiens real life son Yuen Wooping, starring Yuen Siutien, Hwang Jang Lee, Linda Lin, Yuen Shunyee, Charlie Shek and Yuen Kwai. This was Yuen Siutiens final film appearance before his death onJanuary 1979 from a heart attack.
However, Foggy returns home to warn Beggar So, who has been injured by Rubber Legs. Beggar So sends Foggy to a sickness teacher for herbs to cure him, and the doctor teaches him a dreaded style called Sickness Boxing. Now, armed with this sick form of fighting, Foggy is ready for Drunk Mantis. In the end, Foggy goes berserk and kills Rubber Legs. Unable to escape from his trance, he had mistakes about a Beggar So as Rubber Legs and attacks him, the film closes as Foggy leaps after his adopted father as the doctor watches on.
Source: Wikipedia