Alot of people come up with the statement about the snakes feeding response. it is not that he looks at you as food, he has just associate any movement of his cage lid with a forthcoming meal. Usually once they is out of their cage the connection is lost to them and they return to their more docile state-unless you have the scent of something that smells like food to them.
As far as your cage size goes. it is huge by kingsnake standards. Kings are by nature fossorial (that is, they spend a great deal of time underground. Because of this a tall cage is not necessary, as well as an especially roomy one. Fossorial snakes prefer quarters that most other snakes would find cramped. An adult Cal King can be comfortably kept in as small a tank as a 20 long, though I would recommend going a bit larger. Eastern ssp. need a bit more room because of their greater mass. I find a 55gl aquarium perfect for these.
Frank
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"The luxury of not getting involved departed with the last lifeboat Skipper..."