Ah dang, you're right again, Matt. That sends a bad message. If you can heal, you're immortal and can drink and smoke as much as you like. And your blood is a deus ex machina that the writing staff ignores after one season of usage.

I'd vote for sun because the CG/FX sequence would be neat but I can see them going the way of a final showdown where Peter figures out how to strip powers, like his father, at the last minute then I don't knoww, HRG comes in and blows his head off with a gun or Claire impales him.