Laurie's bedroom door opens out into the hallway, preventing Hyde from successfully barricading it. Bedroom doors open into the room, as do most interior doors in houses.
When Red and Kitty are standing in Laurie's room, the poster on the wall shows a Ferrari, which is an Italian sports car. The Italian flag should have vertical stripes. From left to right, the colors are green, white and red. But, on the poster, the stripes are horizontal.
Red and Eric visit Laurie at her new apartment and bring her a box of Krispy Kreme doughnuts. While Krispy Kreme was founded in 1937, it was primarily located in the southeast until the '90s, when major national expansion began. There would not have been franchises in Wisconsin during the '70s.