Remember when Ash was being bit by the severed head, he put it on the vice and the body came in coming after him with the chainsaw, you can clearly see that there is no chain on the saw and when the body keeps running into him look at the throttle handle on the chainsaw, it breaks apart on one side. But then when Ash tackles the body, and he picks up the chainsaw with the possesed Linda's arm off the chainsaw, the chainsaw throttle is back to normal. It did this when at the end of the movie, Ash and his car fall down in 1300 A.D. look at the handle on the chainsaw. It falls off! But when Ash blows the deadites head off and starts screaming, "NO!!!" the handle is back on together! Coincidence?