The sound of leather shoes in the corridor of university dormitory in the middle of the night (lying to me as a dog)

I am a sophomore in a university in Beijing. Something happened in the corridor the night before yesterday. At first, I just felt that I felt it alone, but the next day my classmates felt it with me, so I wanted to post a story in the story.

The night before, it was about 2: 30 in the morning. Because I have the habit of reading novels before going to bed and watching the stars change into stars, I forget the time. At 2: 30 in the morning, I felt sleepy and decided to go to the bathroom to sleep. I don't feel anything when I go to the bathroom. There is no light in the corridor, but there is a light in the toilet, so the corridor next to the toilet is lit. It is very cold in Beijing now. I ran back to lie in bed. Suddenly I feel scared for no reason, especially scared. I feel something threatening me nearby, but I can't find it. After a while, I fell asleep. When chatting with my classmates in the dormitory the next morning, my classmates said that he heard the sound of shoes in the corridor last night. Because that classmate has the habit of talking in his sleep, we don't believe it, but another classmate said, "He didn't lie. He went to the toilet last night and drank my coke! " We asked him what was the noise of leather shoes? He said: "When he came back from the toilet, he heard the noise of leather shoes in the corridor, and they were the kind of shoes for adults or men. The students wondered why there was no noise in the corridor at this late hour. Our school failed to upgrade from three to two last year, so it is very strict this year. In the morning, the teacher called the roll one after another, and the students 1 1 went to bed after lights out. He opened the door to see who it was, but there was no one in the corridor after opening the door. Just a few seconds after he closed the door, the sound of leather shoes rang again. He went to bed because of fear. After he finished, I inadvertently asked him what time he went to the toilet. He said I got up at 2: 30 and didn't see him. He said he couldn't, because his mobile phone was awakened by the advertisement at night, so I looked at the time of his mobile phone. At the same time, I didn't see him get up, he didn't see me, and there was the sound of leather shoes. What's going on here? If anyone really sees this post, please help me answer it. It's absolutely true, and just the night before yesterday, it lied that I was a dog.