Toys R Us, Palm Desert, Calif. (Black Friday, 2008)
This one isn't really a knock on Black Friday per se; two people were killed, but not over a copy of COD: World at War. No, apparently the incident started when two women got into a fight and then two men got involved and they shot each other. Miraculously, no one else was hit. To which Charles Darwin says, "See? Told ya!"