And this is just one reason why a whistle can be so important to have on you at all times - an elderly woman spent four days (!!!!) in ditch near a shopping mall, after she fell in and rolled to the bottom. If she had been able to let searchers (who scanned the area several times) know where she was ...

http://cnn.netscape.cnn.com/news/story.j...amp;amp;sc=1110