Luthor is a real piece of work. And what happened to Clark's powers and invulnerability? Did the Kryptonite cage take them away permanently? Does Luthor know the Secret?

"Oh, you can’t help that," said the Cat: "we’re all mad here. I’m mad. You’re mad."
"How do you know I’m mad?" said Alice.
"You must be," said the Cat, "or you wouldn’t have come here.”

- Lewis Carroll, Alice in Wonderland