The most impenetrable sanctuary one can normally have would be your mind. All of your inner thoughts and the essence of your being are privately yours and yours alone. To lose control of your mind to someone or something else is the deepest level of invasion imaginable and a terrifying proposition. Jerry & Matt look at movies where the minds are under someone else's control with "They Live" from 1988 and "Get Out" from 2017. Pleasant thoughts and hopefully, they are your own!