* The same meteor rocks that accompanied Clark on his journey to Earth pose a deadly threat to him. A few seconds' exposure can make him dizzy and weak. Longer doses can nearly kill him. Only a thick shielding of lead seems to block the glowing rocks' poisonous rays. Lana's beauty isn't the only reason Clark gets weak in the knees whenever he's near her - around her neck hangs a meteor rock pendant. *Source: Back of card.