Where do you stand after getting into the lift (4)

I am normally the first one getting into the lift in yoga studio because everyone is staring at her/his smartphone.  I am the only one staring at the walls, wasting time proudly.  I walked straight into the lift and parked myself at the back, facing the door.  On the side note, I always wonder why people do not do that, I suppose that's the lift etiquette that every city dweller should know?  That gesture gives a group of strangers that are forced to share a tiny box some privacy and personal space.  Anyways, people just want to stare at their phones - scr*w people around me I do not care.

There was the girl stepped into the lift last, who was not holding a smart phone.  The door opened again a floor below, someone tried to get in.  Though there is space behind her, she stared ahead with blank face standing still.  The guy had to maneuver around her to get into the space behind her.  After the door closed, she started to check her eye make up on her reflection on the lift door.  Were I the guy trying to get into the lift, I shall push her in.