I've never had to deal with this vice so I'm going to outright admit no experience with it, but if it were my horse I might try tying it up (under supervision) in the stall near the grain bucket (or whatever you use to feed). Of course, I'd want to make sure my horse was good about tying before doing that so I guess if it's not, I wouldn't go there quite yet.

I'm not gonna lie, "anxious" horses irritate me and I hope I never have to deal with it!

If you're wrong, admit it.  If you're right...shut up!