Fallon *Spoilers*

I have read threads on this site that state that a character has his arm cut off with a buzz saw. In the version I saw in the 1980s Norris pushes Fallon back onto the spinning saw blade which makes a wince-inducing sound effect as it goes into his back. Fallon thrashes a little bit and then Norris gets off once Fallon is dead. At what point did Fallon's arm get cut off in this sequence? Also we never see Patsy, Barnyard and Drugstore find his body, once they hear the muffled sound of the still spinning saw when he doesn't make the rendevous the next scene is Norris pouring gasoline on the floor to trap Drugstore. Was his arm cut off during the fight with Norris in the uncut version or later when the others find him (assuming that that scene was cut from the Brit version).