The Deadly Breaking Sword (1979)

Leaving behind an inch of sword in the spent corpses of his opponents, Tuan Changqing (Lung Ti) is known as the Deadly Breaking Sword. After barely surviving a duel, one of his foes is treated by the diabolical Dr. Kuo, who uses his powers of mind control to transform the man into a somnambulistic killer. After Tuan Changqing teams up with Rabelaisian gambler Xiao Dao (Sheng Fu), the story proceeds as a comical kung fu buddy flick.