Continuity mistake: When Michael Myers stabs the first two knives into Rudy and it goes through the door he gets the other one out of the drawer which is about three meters away but when he actually takes it out of the drawer and stabs it through him the drawer is like fifty centimeters away.
Continuity mistake: When Michael Myers is holding the tripod to impale the crewman, the length of the sharpened end changes in length and shape numerous times. First, it's wider and smaller. Then it's slightly longer and narrower. And when it's finally through the victim, it's long enough to go through the neck and into the adjacent wall.