I use a paper towel roll per a suggestion on these forums to kind of move my bumble bee's head away when I'm looking to take him out to chill and he's hungry/there's rat blood on the paper still. It's clear when he's on the hunt, and I'm not trying to move my hand into the cage when his head is having lightning fast responses to my movements. He also starts wobbling when he's ready to eat strike, so it's clear that he's going to go for me if I don't calm him down. That's because I'm a huge pansy... however I did get to vote on the recent thread that I have never been bit by my snakes As far as calming down aggression, etc.. I do not feel it is needed. I have taken my snakes out of their humid hides mid shed (nice job pooping in there...) and the worst they'll do is huff and puff or jerk their body like a hiccup but not actually strike.