I've never quite understood the Black Friday mass insanity. Whenever I look at the advertised prices, it usually seems there are better deals to be had later in the year, in the post-Christmas sales, or end-of-the-season sales for clothing.
The idea of braving the crowds in the stores and possibly getting into a tussle over a piece of merchandise which is on sale is about as appealing as joining a stampede off a cliff.
Or maybe it's just that after an entire day of being on their best behavior with their in-laws at Thanksgiving, people are actually that desperate to get out of their homes -- at midnight if need be. And maybe all that enforced good behavior puts them in such a bad mood they're spoiling for a fight the next day.
I can't think of any other explanation.