Brief Encounter

I had an encounter with a girl from my old school today. She didn't recognize me which I'm taking as a good thing! but I still managed to humiliate myself in front of her. I was walking to the ladies and she was a few steps ahead of me. I only realised who she was when she held the door open for me, but I didn't say anything as she didn't seem to know who I was. Anyway she looked in the toilets and then turned around and left. As soon as she looked at me my immediate thought was "oh shit, please don't recognise me". While I was washing my hands she came in again and looked at me and asked me if there was someone in the end cubical, which there was, but I panicked and said no. Then a second later I corrected myself and mumbled that actually yes there was someone in there, dried my hands and left :s Okay it wasn't the most humiliating thing in the world but I was pretty embarrassed by it. This girl used to one of the 'cool' girls at school and I don't think I ever talked to her, other than maybe a few words. I realise I should have used the opportunity to strike up a conversation but I was so flustered I don't think I could have managed it.