The Werner Herzog documentary "Little Dieter Needs to Fly" tells the story of Dieter Dengler, shot down over Laos early in the Vietnam war, his capture, torture, deprivations and eventual escape. His life is also the subject of a separate dramatic movie.
Early in the documentary (about 5 minutes in, available to stream from Netflix), Dieter is showing his present-day home, where he lifts an access panel to his crawl space where he has stored buckets... "1000 pounds of rice, 1000 pounds of wheat, 300 pounds of honey, etc.".
He says "I'll probably never need this, but I sleep so much better knowing it's there.". This is a man who, emaciated at his rescue, experienced real starvation.
I saw this before becoming active in my preparations, and it very much got the wheels turning for me...