Why do people say goodbye, walk away and then look back?

Anonymous
I started wondering why people say goodbye to you, then walk away and then turn and look back? It's not something I've ever done. I have a male friend who I have known for about 8 years and when we used to say goodbye he used to just walk away, we had a falling out, but now we're friends again, but I've noticed the few times he's been to my house recently after we say goodbye he starts walking away and then looks back, what I was wondering is why do people walk away and then look back?
Why do people say goodbye, walk away and then look back?
1 Opinion