I liked Lana's attempt to trick them toward the kryptonite, but how did she know the vault was there, or what it would do to them?
When Lana awoke in the Luthor mansion (after Lex picked her up off the road), she saw Lionel scratching something into the floor (the tatoo on Krypto-Barbie's back). Then he stands up all trance-like and says that their home is their only poison or something like that. And he's looking into the vault (that Clark tore open the episode before hand) and the meteor rocks inside are glowing and casting their light over both of them.
.. another thing I noticed after watching the episode a second time. Don't you think it's strange that there were exactly 2 images of Smallville on national TV (the scene with Chloe & Clark in some hospital) and then Clark immediately knows that his parents "didn't get out"? The second question might be explainable as I didn't see the previous episode but the first one ..
One of the clips that the TV showed was of the Kent's house (1/2 way destroyed by a meteor), with the Kents packed truck still next to the house... Clark assumes (correctly) that if their car is still there, then they are as well. They could have walked away of course... but they obviouisly didn't drive, and so chances are they weren't far away if not at the house when it was struck.
Chloe is Lois. No. She is. Maybe she doesn’t have the name, but in every way that counts, in every way that matters, she *is* Lois. She knows who Clark is. She told him to “Go.” And when he used his powers in front of her, she gave that nice, “Whoa.”
She’s as Lois as Lois can be.
I couldn't have put that better. In fact I was saying that as the scene was going on!