Beware the shit snake. http://vimeo.com/52564855 This thing wants to get into the intestines for a bite to eat & make a nest.
http://alienanthology.wikia.com/wiki/Hammerpede, http://avp.wikia.com/wiki/Hammerpede,
http://aliens.wikia.com/wiki/Hammerpede, http://www.avpgalaxy.net/alien-movies/prometheus/creatures
After it has made its shit nest it rips back up near the top of the dead victims throat to guard its nest. It pops out when it senses several other people approaching.
http://www.prometheusforum.net/discussion/2802/the-hammerpede-scene/p1
