So I took the tour for being a Package Handler.. listened to what they had to say and stayed to the end of it. No big deal. I'm down for physical work.. but now i'm sort of paranoid. Do you get to choose whether you want to be an unloader or a loader? From my understanding, being an unloader seems to be the easiest.. but probably the more physically demanding of the two. With the loader, what exactly is meant by "building walls." I mean, I understand the premise.. but what does it entail? Is there a specific order (other than heavy boxes on bottom.. lighter on top) that they need to be in?