The original script, written by star Robert Chapin, was much darker than the final product in which Alex, the main character, was suckered so deeply into the world of drugs, money, women and bloodsport that by the time he was reunited with Elena, he doesn't even recognize her. When MCA/Universal picked it up for home video distribution, they deemed the original script too dark and hired another writer to revise it to make it more lighthearted.
In the first fights without swords, a guy dodges an attack by back-flipping and landing on his belly. After this he gets up and does a double front kick, Again he falls, this time on his back. During both falls a crash mat can be seen.