My spider likes to explore, and when he's roving around he almost always has his head held a good 6-8 inches in the air. He's my little periscoper.
Anyways, when he gets really into exploring, he'll start to kind of 'twist' his head around in a circular motion, and he swings it up and down and around, and for the majority of it, his head is up-side-down.
I realize spiders have a head shake, and this is definately not a shake. It's more like a dance than anything else.
What is he doing, or why is he doing it?