From a comment: "Someone did a really good video about the movie "The Thing" also by John Carpenter. He talked about how the Thing could mimic friends, people you trust, authority figures, anything and you can't see it until it's too late. This caused everyone to trust no one and to split hairs about everyone around them and their every move. They could trust no one no matter how sure of them they would have normally been. They never knew who are what the thing was until it sprang to infest a new host. Very interesting."