Smallville "Shattered"
So, Lana has been stalked by several psycho boyfriends; a killer clone girl; not to mention swept up in tornado and who knows what else, but she realizes it's dangerous to be around Clark after Lex pushes her and then a horse stomps on her head.

I have my yardstick here and am prepared to whap the writers on their knuckles, repeatedly, for that bit of sophistry.

Also, although I'm disappointed that there are no clones as of yet, I do think that my sekrit Smallville theory is going to be proved true. Lex's quest for power over Clark is going to stem from his sense of betrayal, yes, but more from his belief that Clark is really here to take over the world. And more-than-a-bit-unbalanced-Lex is going to believe that only Lex can stop him. And Clark, being Clark, is going to be wracked with guilt over what happened to Lex is going to try and save Lex repeatedly, and be unable to stop him in a more, er, permanent fashion.