Friday The 13th: 13 Superstitions That Show Our Fear Of The Number 13 (PHOTOS)
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Friday the 13th is said to be unlucky because it combines a historically unlucky day and unlucky number.
The No. 13 has long gotten the human race riled up -- back to ancient times. It's even led to a condition called triskaidekaphobia, fear of the number 13.
That fear for 13 has led to some strange decisions and unusual behavior in the past. Here are 13 examples.

First Posted: 11/16/10 Updated: 5/25/11