Walt's fake confession was deliciously evil.
Poor Hank. He's just not up to par with Walt. However, Jesse might do his work for him, after all. But if that happens, how will Hank fare? The circumstances will make him look bad to the DEA, perhaps even complicit (depending on what they find).
Can someone explain to me, though, how Jesse figured out that Walt was behind the poisoning of Brock by looking at the cigarettes? If I remember correctly, Brock was poisoned by a flower Walt had in his garden, not the ricin from Jesse's cigarettes. I don't quite remember the details of the ricin cigarette storyline.