↓ Transcript
[Now inside the fence, Lauren slides her rucksack off as she walks forward.]

[She sets the rucksack down on the ground, crouching next to it.]

[A dark panel with nothing but a rectangular outline where light is leaking in from outside.]

SFX: BANG... BANG... BANG...

[The light outline becomes more jagged and bent as Lauren continues to work at it from outside.]

SFX: BANG... BANG-- CRUNCH

[The battered door swings open and we see Lauren from inside, holding an upside down claw hammer in her other hand.]

SFX: creeeeeeeeak

[A closeup on the contents of the door; an electrical control panel of some kind. Lauren runs her fingers over the components.]