If someone is walking toward a door but stops right in front of it, or when the elevator doors open and they just stand there blocking the way, can I tell them to move inside by saying **“Head in!”** or **“Head inside!”**? I know these two expressions are often used to invite someone to go in together, like **“Let’s head in”** or **“Let’s head inside.”** I also know there are more polite options, such as **“Step inside, please.”** But what I really want to understand is how **“head in”** and **“head inside”** sound when used as commands. 1 Can they be used naturally in this kind of situation? 2 If I’m angry and shout **“Head in!”** or **“Head inside!”**, does it sound natural? 3 If I’m not angry and just say it normally, how would the listener feel? 4 Also, if I tell someone to **“Head inside!”** a very small space, like a closet, does it sound a bit dramatic — as if the closet were some kind of separate world?