Very defensive kingsnake is suddenly calm?? Is there something wrong with her??

[IDvsEGO]

One of my kings had a moment like this. It has been tail rattling and musking since I received it. Yesterday it was trying to race out of my hands and I was going hand over hand. I made a little cup and it froze. Just sat there for 3-5 minutes being super chill. I go to put it back in its enclosure and it starts a little tail shake again and scoots around the tub. I figure I am making progress but it isnt totally comfortable yet. This snake isnt a problem or anything but it does show me just how lucky we have been with all of our others. This is our 5th baby and the only one that has shown any real stress. Its eating weekly though so I am OK with it. It will get there.