Ew.
This just in from the "Shit that will prevent me from sleeping comfortably for the rest of my life, even if it did happen in friggin' Africa" department:
http://www.spiderzrule.com/spidersnake.htm.
(Image linked from spiderzrule.com. Also worth pointing out that the image title is, and I quote, "sssssshhhhiiiitttt!6_small.jpg").
Originally found via digg.com with the fantastic titles "Spider pwns a snake".