The regurge doesn't worry me as much as the involuntary recoiling he is doing does. No, he's not frightened. He is doing it when I'm far away. He will just be going about and suddenly cork screw his neck, hold it a few seconds then go about his business. It's not a strike pose. It's a cork screw. He hasn't come into contact with anything different. The only change to his set up was some moss I put in. I took the moss out yesterday and got him new substrate today. Has anyone heard of this before?