Originally Posted by Nave 'Torment'
Batman figures it out. It takes Clark --and everyone else who conceive of him being invincible-- by surprise.
EDIT: as for how Batman figures it out? Again, he doesn't until he tests it on the field. He risks his neck on it. This is science-savvy Batman.
Really? It sounds too stupid for batman.
N in MOS version, I don't think CLark knows about the effect of K on him. Or is there K in the MOS universe?