I think the virus used in HIWTHI was made with kryptonite. Also, his invulnerability seems to be something he can strengthen or weaken by thought control, so if he wasn't expecting it, a poison might work.
The hypnotism episode was Illusions of Grandeur.
I think, therefore, I get bananas.
When in doubt, think about time travel conundrums. You'll confuse yourself so you can forget what you were in doubt about.
What's the difference between ignorance, apathy, and ambivalence?
I don't know and I don't care one way or the other.
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