Bombs Over Wal-Mart
What appeared to be an explosive device was found in the refrigerator in an Arizona Wal-Mart Supercenter. A robot promptly removed it just in time for shoppers to physically maul each other. The robot was later sold at half-price.
Fun fact: In 2009, nine shoppers in a California mall were injured, including an elderly woman, as gift cards were tastefully released from the ceiling, sparking violent chaos.