I'm usually not that superstitious, but somehow, Friday the 13th makes me a little bit nervous. Good thing it will only happen once in 2011-black cats, beware today!

It's that time of the year again, when Friday and 13 align. (Although it happens three times in some years, it comes just once this year.)

(via Spooky Superstitions for Friday the 13th | Gallery | Glo.)