Big Plot Flaw - spoiler
So, the lead character in the movie stupidly decides to cut off her whole hand when all she needed to do was cut off her fingers only. What an incredible waste! The writers of the script apparently forgot that the name of the movie is Knucklebones (emphasis on the word knuckle). Also, I seriously doubt that she would have been able to cauterize her severed arm without passing out into unconsciousness.