In the beginning of Halloween II, a prelude from Halloween I is given. This whole scene was actually reshot for the second film. The slipup is that Dr. Loomis tells the sheriff that he shot Michael Myers 6 times, though when you count the shots fired, there are seven bangs. In the first one there are only 6 shots fired, but since the sencond was done over that mistake was made. That is probably one of the biggest goofs in the movie. Someone needs learn how to count.