After violating thc intimate sphere, mental distance can be reached by turning the head away, looking away, focusing on something else, standing sideways or backwards.
To increase the distance between your and your interlocutor you can bend back or put your legs in front of you.
People who stay in a good contact instinctively assume the same positions and do similar movements like in a mirror. Remember that even if we wanted to express positive feeling to someone we don’t know by embracing, patting, decreasing the distance - they would probably react negatively because those gestures represent some kind of intimacy.