↓ Transcript
[Four survivors trek through the rain. One is leaning on another, with a bandaged foot.]

[The rain is kicking up a lot of haze and mist, but they slowly progress onward.]

[The sky is gray and dreary.]

SFX: RUMBLE

[The four of them (a black man in glasses, a white man, and a middle-aged Japanese-American woman and her teenaged son) stop and look skyward at the sound.]