How odd. Sounds like maybe she was spooked or startled? I have noticed with my hypo, that when he is in one of his growth spurts, thinks he needs to eat everytime you open his lid. And will come out looking for food, ready to strike. But never hissing and open mouthed. Maybe she is growing and was hungry and grumpy? Long shot, but idk??? Wish I had something for you.![]()