- Continuity: Parades gets his leg broken in the fight with Chong Li. However, throughout the next several scenes he is unhurt and seated on the bleachers.
- Revealing mistakes: When Dux and Jackson are playing Karate Champ together, a closer look at the screen reveals that it is in single-player mode.
- Continuity: Right after the shot of the sumo fighter falling to the mat after being defeated by Dux, there is a cut to Ray and Lin cheering him on. However, the sumo fighter is seen still sitting behind the two of them in the upper right corner.
- Anachronisms: The film is from 1988, the flashback scene is at least 10 years prior. During the flashback scene in which Frank defends Shingo from school bullies, one of the onlookers is wearing a "Bartles and Jaymes" T-Shirt. Bartles and Jaymes was introduced in 1985.
- Errors made by characters (possibly deliberate errors by the filmmakers): In a flashback to young Dux's childhood, while accompanying his menacing friends to steal Tanaka's sword, Frank is wearing a NY Giants jersey and a SF Giants hat.
- Continuity: In the final fight, Dux's hair goes from very sweaty to dry back to sweaty again after he is blinded and knocked down the ramp.
- Anachronisms: During the epilogue, it states that Frank Dux retired from active competition in 1980, thus, all of the events in this movie are supposed to take place in or before 1980. Before the Kumite, in which Dux competes, Dux and Jackson are playing the arcade game Karate Champ, which didn't come out until 1984.
- Miscellaneous: At the beginning of his fight with the giant, Jean-Claude Van Damme kicks him in the left pec. In the next shot, the giant is rubbing his right pec.
>>> WARNING: Here Be Spoilers <<<
Goofs below here contain information that may give away important plot points. You may not want to read any further if you've not already seen this title.
- Revealing mistakes: SPOILER: In the scene where Chong Li fights Chuan Ip Mung (yellow belt and silk pants) he is clearly still breathing after being fatally wounded.
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