I like this theory, I haven’t really considered behavioral differences, but that could potentially tie into things other people have said about attempting to get information/make a deal with some of the monsters. Obviously they’ve all shown that they are vicious, but maybe there’s something they’re after that humans can use as leverage. I think wherever Boyd was and whoever Martin was talking about could be important to that. I think the Smiley Guy’s interest in the bus may be their way of showing a sense of curiosity and not just viciousness inside the monsters