A teacher was worried that her students might not know about Jesus Christ. She wanted to make sure they understood that the birth of Jesus happened for real. She asked her class, "Where is Jesus today"
Steven put up his hand and said, "He is in Heaven (天堂)."
Mary was called on and answered, "He is in my heart."
Little Johnny shouted loudly, "I know, I know! He’s in my bathroom!"
The whole class got very quiet, looked at the teacher, and, waited for a response (反应). The teacher was really at a loss for a few very long seconds. At last, she asked little Johnny how he knew this. Little Johnny said, "Well, every morning, my father gets up, knocks on the bath- room door, and shouts, ’Good Lord (上帝啊), are you still in there’\
What does the underlined (划线) part in the story mean