Lana

I always got the impression that Lana's reaction in Reckoning was completely bogus. It might only be me, but I cannot belive she's gonna be all cool about it. It's gonna take a time for her to digest these news. source

That scene bothered me on the second viewing because if you watch the fall, Lana was getting very close to the ground before Clark even caught her, then they're shown for about five seconds with her in his arms falling. They should've hit the ground immediately and instead, fell another 20 or 30 floors. source

I don't have anything against her, but no, once again her appearance would overshadow Clark trying to take hold of his destiny. He shouldn't have to share second billing with his ex-superpowered girlfriend. source

Lana she come close but not find out but they smallville needs to do something everything starting to get old. Clark and Lana, Lana don't know about Clark, Lex and Clark hate each other, weird tention between Chloe and Clark and Lois... source

Well the guy had Martha and JK tied up in the barn, so if she didn't try and fight him, they could have died. And she probably fet a little guilty and shock afterward, but in the scene ith Clark she probably had a little more on her mind. source