The thing too is, Jacob, that even if captive born these are always snakes with all their natural and highly instinctive behaviours hardwired into them. So they may hiss, nip, jab, coil, flee, whatever as their instincts drive them to do for whatever the reason is. We might not understand that behaviour at the time because we judge it against our human experience. The way I look at it is this...

If my snake is reacting, even if I don't understand it, that means the snake is aware and engaged in a healthy participation in it's environment. I don't want our snakes stressed and highly reactive of course, but the occasional reaction isn't something I worry about. I consider it just the snake being a snake, am glad they are involved in their life and go about my business. (okay I've been known to murmur "oh darn aren't you just too cute" when one of the little babies hisses at me...but darn...it is cute!)