Revealing mistake: In the beginning of the movie, when Michael removes the knife from the drawer, you can see the blade bend.
Revealing mistake: In the rape scene, the guard hits Michael in the back with a baton. It leaves an indent in the material of the suit he's wearing underneath his robe.
Revealing mistake: When Michael is young, at Christmas, Dr. Loomis approaches Smiths Grove. There is snow on the ground, but the leaves on trees are green.
Answer: Laurie's father, Mason Strode, is a realtor who owns Strode Real Estate, and there's a realty sign post in the front yard of the old Myers house. Mason tells Laurie, "They're coming by to look at it later," so we know he's talking about people interested in buying the old property. When Michael sniffs the envelope we see the Strode Real Estate logo, and it presumably contains realtor's paperwork which is pertinent to the sale of the house, and is meant for the people who will be coming by later.
Super Grover ★