One chance in a million

It may seem normal, a coincidence which happens once in a while. But it’s just felt a bit mysterious to me. Last night as referred to 2 hours ago, I saw a girl on the tube, we glanced few contacts at each other. I stepped out at one stop to buy some groceries and she continued the ride. I left with this girl in my mind for a while remembering her smile when she lost balance and was about to fall down. She was pretty and that was it, kept moving. I return home later and surprisingly find that girl in my home. I look at her and before I ask, she answered yes I was on train with you. She didn’t give me a chance to wonder for long. Who is she anyway and why she was in my home? Nothing mysterious or strange, she was a friend of my flat mate who visited to stay the night over.