My Syrian hamster was sitting calmly in my arms and then suddenly jumped and began running on my arms so I played with her a bit and then she jumped on my bed and started jumping, flipping, and somewhat lunging toward me on her hind legs while making low sounding squeak noises I had never heard before. I was so scared! She quit making noises but began jumping again after running frantically on my bed the fastest is ever seen. I had done nothing to scare my hamster and it was acting perfectly normal before. I am so worried. What happened to her?