Happened across an article this morning, "Will two flus mix in Indonesia?":
Indonesia's first cases of the new H1N1 flu have raised concerns that if the virus spreads it could combine with the entrenched and deadly H5N1 avian influenza to create a more lethal strain of flu.
Yeah, right. A new strain of avian swine flu?
When pigs fly.
(The article was quite serious, but I couldn't resist the joke.)