For the release of Resident Evil 5 Capcom tried to emulate a trick used by the producers of the Batman Film: The Dark Knight. The Batman idea was to distribute joker cards all over a few cities to get folks excited about the movie; Capcom chose body parts instead. Imagine if you will a leisurely walk around Trafalgar Square (a.k.a. one of the bigger tourist spots in London) and you stumble upon a severed head, what bad could come of that? The idea was for the person to find the most severed limbs and other body parts was to win a trip to Africa to celebrate the game’s new locale. The publicity stunt went wrong for two reasons: many folks took the body parts and simply kept them for some bizarre reason, or even worse, mistook them for real ones and contacted the authorities. The second problem was that the parts were smeared in chicken livers and blood, making them a huge contamination risk due to salmonella and other food-borne diseases.
They got desperate due to pressure form a few groups to release a few statements like:
"The body parts are very realistic and we don't want people to be alarmed by them. They've all been taken from their original positions, but we now have no idea where they are.
"If you have them, please either return them, or dispose of them in a responsible and careful manner. In addition, chicken livers were used for added gore, and, uncooked, they can be dangerous."
To make matters worse the participants were told to stand around and nonchalantly wave the severed limbs around:
“Participants were instructed to: ‘Alert [Capcom] to your presence by standing on the bridge, holding the artificial body parts over your head and shouting “Kijuju!”. We will be there, watching you, and will approach when you make yourselves known.’”
….which caused a bit of panic.