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Shoppers wait for a midnight opening at a Best Buy store on Thursday, Nov. 24, 2011, in Brentwood, Tenn. Black Friday began in earnest as stores opened their doors at midnight. (AP Photo/Mark Humphrey)

Shoppers wait for a midnight opening at a Best Buy store on Thursday, Nov. 24, 2011, in Brentwood, Tenn. Black Friday began in earnest as stores opened their doors at midnight. (AP Photo/Mark Humphrey)

Black Friday madness

January 1, 1970

A few violent incidents broke out on Black Friday as thousands of shoppers lined up in the wee hours of the morning at Macy's, Best Buy and other stores to get discounts of up to 70 percent on everything from toys to tablets.