This discussion may contain spoilers!
Many of us seem to forget that in Season 1, every single preview/trailer for each episode was almost always completely different to what happened in the actual episode. Examples:
S1 Ep 2 - We never saw Carley/Doug hand over food to Lee, or see Lee talking to Kenny by the steps at the motor inn talking about starving. Nor did we see Ben firing a rifle at walkers etc.
S1 Ep 3 - This was almost right apart from the fact we don't see Christa and Omid killing walkers in the abandoned building where Lee and Clem were.
S1 Ep 4 - Again mostly correct but had a few scenes and character lines that we do not see or hear in the actual episode.
I realise it's not important but my point of this thread is, don't be fooled by the S2 ep2 preview/trailer because a lot of things we see in it probably won't happen the way it is. For all we know when Clem said "I thought you were dead" in a surprised/shocked face could be seen in the actual episode as a very happy "I thought you were dead"
We will see