"Retroviruses are like a speedboat full of grinning Somali pirates who go careering hundreds of miles into the Atlantic to take over passing supertankers, by randomly firing off their ancient AK-47's at anybody on board. When they succeed, they get great big ransom payments from Lloyds of London. Everybody's happy, and the pirates go back to Mogadishu and make a lot of little baby pirates."
Feel free to be the first
Please review the linked page for context.
If you can think of something better than this,
please add it to the database