How Home Alone Turns a House Into a Siege Engine

The screenplay does not begin with Kevin alone. It makes the house legible as a network of doors, stairs, adults, children, luggage, and missed attention. The later siege works because the reader has already experienced the building as a machine.

Kevin reads the empty house as proof that his wish worked. The emotional wound and the spatial opportunity arrive together: every room is now available, but no adult system remains.

The defense decision changes Kevin from abandoned child to operator. Locking doors and turning on lights are the first tactical uses of domestic routine.

The montage turns ordinary objects into a causal map. It begins inside the scene that sends Kevin home from church, so emotional repair and tactical preparation share one movement.

Source note: In this source draft, the preparation montage is embedded after the exterior church heading rather than separated into its own canonical scene.

The bell count, crowbar, door, and BB gun convert the plan into timed execution. Each gag now has a route, trigger, and anticipated body.