Probably one of the worst case of life threatening accidents are shark attacks. These can be very devastating. For those people who come out free from an attack are very lucky, but millions of people still lose their lives to shark attacks each year.
Previous pinner said: Exhibit A. White lion and cubs. I moved this from my "Mammals" board when I found out that it had been Photo-bleached. Come to find out, this image is even paler than the one found by my fellow "truth in reporting" detective.