Well, I'm not saying your gecko is sick but I want to bring up that when a tame specimen of an untame species comes up, it's usually parasites or some other sickness that's causing it.
Still, even with the wildest of beasts, there's always going to be that one that does tame. There are exceptions to every rule, but it's a good general precaution to stay weary of Knight anoles. Also, I usually find them being sold sick, underweight, and very small (less than a foot total length). I'm sure that people take them home and nurse them to health only to find a healthy, robust, grouchy, and two-foot-long beast ready to bite the hand that feeds it, so... It's not something you buy and expect to become tame!
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Got hips like Cinderella / Must be having a good shame / Talking sweet about nothing / Cookie I think you're Tame 