As a person born in the seventies, I grew up with the Cold War still being a big thing. Nuclear war was the monster under our beds, the subject of terrifying and heartbreaking cartoons, and probably most people’s biggest fear. What would you do with your 4 minutes? Boil an egg? You wouldn’t have time to eat it, plus I like mine with a fairly solid yolk, so I would need 5. If they could please change it to an 8 minute warning I might just about have time to boil an egg to my preferred consistency and eat it. Not sure why egg eating was so important, maybe eggs have secret powers to protect you?!