I calmly walked back over pounded on the window six times and waited , I even called out " Stephen are you all right . " He knows you can see through the blinds up close , but she did n't . I saw him get up , get dressed and then the next thing I know he is opening the front door , so I walk over to meet him .

Question: Why did I knock on the glass ?
Answer: None of the above choices .To loosen it for refitting .To make sure it was locked .To make my presence known .