Yep. For instance: I would never, ever, even attempt to dance with my female sonoran-as I know she is a snake with quick and unexpected mood swings.
IE: Today I went to take her out, and I placed her on the floor (had to use the hook to take her out-she is territorial of her cage) and unexpectedly, she made a beeline for my foot. No hissing, no warning, she just went straight for my foot.
Yikes! She ended up going back in her cage as soon as she stopped trying to eat my sandal. :P