They scurried away. It's interesting to notice what items disappear first during panic buying. Bread and milk, of course, go rapidly, as does hamburger. But candy seemed to fly off the shelves as well. It struck me that most Americans know little to nothing about deprivation.
People complain bitterly when there are more than three people in the checkout line.
In the old Soviet Union, lines around the block were common. Most people have no conception of shortages. Going to the grocery store and finding no milk or bread is an occasion for screaming and yelling. I considered this as I grabbed a bag of Hershey's Kisses. And make sure you have first aid supplies, too.