Kindness of stranger

I think a time comes when you meet a person for sometime and he/she will leave an impression that you start wondering, was it for real or was it GOD? I remember it was 2 am late. Everyone was sleeping in the hostel and I was walking near the corridor of my hostel. Our hostel was being renovated so they had left most of the place unsecured. I was walking through such place and I slipped and fell down. My leg got tangled on the stairs and I was hanging upside down. That point I even didn't scream. My leg was hurting a lot and then I saw a hand reaching for me. I grabbed and got away from the disaster. I thank him and he said to be careful and walked. I went to my room and drank water. After a while I wondered who on earth was this guy who helped me because I know all the people living in the hostel perfectly. He was wearing a vest and a track pant. I told my room mate about it. Strangely this guy was never a member of the hostel and out hostel gate would be locked. I thought that maybe he is one of those guy doing renovation but the next day I didn't find him. I never saw that guy from that day. I would for the next two days at same time walk along that corridor but could not find him. I don't know, but it left me with no option but to believe that he wasn't oe among us.