What age is you corn? if he sub adult he will be like a teenager so keep you hand there he will back off after a while. Don't move you hand as you will brake he teeth, I had many snake that go like this. They are trying to see how far they can push you they dont hurt it's all the shock that his bit you. You can open the viv door and let him come out on own and keep your hand there for him clim on you.