In 1993 Jack in the Box caused the most infamous food poison outbreak in contemporary history, 732 people were infected with E. coli, 4 children died and 178 other victims were left with permanent injury including kidney and brain damage. Health inspectors traced the contamination to the restaurants' "Monster Burger" sandwich which had been on a special promotion (using the slogan So good it's scary!) and sold at a discounted price. The ensuing high demand "overwhelmed" the restaurants and the product was not cooked for long enough or at a high enough temperature to kill the bacteria.
SOURCE: nuttyfacts
