ok i just coped a APT from my girlfriend for my birthday, still a very young sling.. only about mabey a inch and a half in length.. ive handled it with no problems.. its just somtimes. it will be walking around and both fangs with go oppositlly go up and down at the same time and then it will"yawn" with the the fangs straight out... mind you this is while the sling is walking around.. im not worried since its doing great and no started its nest at the top of the tank.. its just kinda weird .. any input would be cool.. im not really worried about anything, im just a little curious ... THANKS!!! o by the way... this is my 1st post..