This story happened when I was in a camp in the sembawang park. My friends and other people went to play blind fold and we were all blind folded. My friends and some other went to put some obtacles to block us and then when we walk, we heard someone humming a song and I though it was my friend. Then I peep and look at the floor there is no one there standing beside me!!!!!!!!Back to the tent, we were talking that someone was humming song and ask who is that. They say that is not them. So what are your command about this story?