As in, Excuse Moi!
Did you know that each person has an ideal personal space that is just perfect for them? Culturally there are commonalities but each person is as each person is. I respect other people's personal space because that is the way that I would like them to treat me. What happens when someone invades your space? You feel uncomfortable and if you're too nice to let them know, you just let them keep doing it, but inside you are seething mad because why can't they respect your space? Or you could just let them have it! As you can see, some trees have no personal space...