Blue Angel Scene

In the scene where the Professor is alone with the dancer, it seems to be that he is nervous. He sits next to her and just smiles. He likes her but he doesn't know what to say. She tries to get him to have a full conversation but he can't talk. He is in shock that he sitting next to this girl. It is almost odd to see two grown people sit there and just have this awkwardness towards each other. She is not as exactly awkward towards him but he is just like star struck. As if he really can't believe that this is happening.