Sam: Okay. So what are you thinking?
Dean: I don't know, unholy ground, maybe.
Dean: What? If something evil happened there, it could easily poison the ground. Remember the--the farm outside Cedar Rapids?
Dean: Could be the sign of a demonic presence. Or--or the Angela girl's spirit, if it's powerful enough. (Sam nods, rolls his eyes and walks away) Well, don't get too excited, you might pull something.