We can never tell what our students really capable of

I teach wuthering Heights. Last Wednesday I was ill and kept thinking of what to do on Thursady. So I told my students that should work in groups and meet today for tomorrow we'll have a competition between them. The winner is the group who will act the new two chapters. On of the group posted on facebook and asked to have the class on the stage in the theatre. I wondered why. I thought they don't have time. However, I kept my low expectations within myself and agreed. I was fascinated by the sound effects they used, how and what they wore....They were PEREFECT.....and I told them you are a traesure but a hidden one.