Trivia: There was a scene filmed in which Annie Wilkes runs over a younger police officer with a lawnmower, but it was cut because the director thought audiences would laugh at it.
Suggested correction: The incident that this question is referring to is in the book - it was never added in the movie. Annie kills the young cop with her lawnmower. It was left out of the movie because the director didn't want the audience to hate the actress Kathy Bates, also which is why he had her use a sledgehammer instead of cutting off his feet.
Revealing mistake: When Paul and Annie are getting ready to tap glasses, you can see Annie deliberately knocks over the candle. She moves her hand right into the candle to make it fall over.
Suggested correction: It is implied, though by no means certain, that Annie may have intentionally caused the glass of wine to spill, especially as at this point she already knows Paul has been out due to the direction of the Penguin figurine.