Mr. Krieger is a general manager of a large hotel. One of his favorite foods was pizza. One day he had the Room Service deliver a pizza to his room, but he did not finish it, and accidentally forgot to refrigerate the remainder. The next day, he ate the remaining piece for breakfast. The consequences were dire. Mr. Krieger went down with the worst food poisoning one can imagine. The symptoms ranged from vomiting and diarrhea to high fever and hallucinations. Luckily, he recovered, but ever since he cannot even taste pizza no matter how fresh it is.