->> http://en.wikipedia.org/wiki/Sulfur_hexafluoride

Well at least in paranoid Boston.

Turner broadcasting posted these all over the city. They have been hanging around and lighting up at night for around 2 weeks now but today someone called in a suspicious package.

Bomb squad shut down the entire city and started detonating the ones they found. I thought the bomb squad has some technical knowledge and could instantly see that there is not explosive attached.

http://www.cnn.com/2007/US/01/31/boston.bombscare/index.html

Woman gives birth to baby, but never knew she was pregnant.
http://www.wbir.com/news/national/story.aspx?storyid=39229