So i know sometime ball pythons can get a bit grumpy, but this has never happened before. My ball python (Bernadette) had just finished eating (like she had already fully swallowed the rat) and she was moving around to go back into one of her hides. So i grabbed the lid of her tub to put it back on like i always do, and it sounded like she hissed at me? She was doing that thing where it looks like she is yawing to re-align her jaw and while she was doing that she made a hissing sound. Then it looked like she was going to do that yawning jaw re-alignment thing again and she made another hissing noise. This seemed weird to me because she NEVER hisses; the only other time i can ever recall her hissing is the very first day my husband and I got her, and we've had her for about four months now. I'm not sure if maybe I startled her when i went to go put the lid on because i suddenly appeared in front of her tub and she was facing the front of her tub at the time? And she had just finished eating so maybe she got into a little bit of a defense mode? Could that be it? I just found it odd because she has such a calm and mellow personality and never hisses so I just thought it was kinda strange behavior for her. What do you guys think? Thanks for your help!!