when they are frightened they will sway side to side to keep you from seeing them so they think.Most will gape the mouth and jolt their bodies to get you away from them.They can get restless trying to get out to a more hidden spot,they are not made for speed and they know it so thats why they reley so much on their camo and hiding so I think its very unatural for them to be forced into plain site.Lots of branching and leaves really helps this for them in a cage,tall caging is very helpfull too so they can get up away from you if they want.They will stop eating too if they become really unhappy.These are some things I remember,but keep in mind Ive seen some that dont seem bothered by much either.The way I see it,I would hold mine in my hand up high a bit,you think hes just chillin but what else is he supposed to do,then you walk near a tree and he goes bezerk to get into it and off of you.Hopefully this helps,its just what Ive noticed with them.Again,some are not bothered by much but unlike a beard or iggy who can easily think it can kick your but and sometimes will try,these guys are like get me outa here!lol.