Thanksgiving sale

Today was a 'Black Friday", day after Thanksgiving. This is the time of the year when you can see hundreds of people standing out in long queues outside stores to satisfy their thirst for materials on sale fighting any harsh weather be it cold winter or cats and dog rains.
Most of the products that were on sale in these big stores BB, CC, Staples, WalMart, one could easily buy them on internet in different times of the year with maybe even more discount. Then why this mad rush to buy things at odd hours of the day ? As if all these items on sale were about to be extinct after the sale. I think its one thing thats the best in this country - Advertising.
And you can move masses !!!