my encounter with almighty

When my son was 4 yrs old he had to dress up like Kanha for janamashtmi celebrations in his school. we live in delhi, and there is a fancy dress shop in bylanes of old delhi. so along with my husband we went there for his kanha dress. as we were coming out of the shop there was a power failure and it was very dark outside. my husband was walking in front of me and i was holding my son's hand. suddenly he tripped and fell down, it was a uncovered drainage and his feet got struck there. I let go off my son's hand to help my husband get up. suddenly i heard my son crying, he was nowhere to be seen, as it was dark, i was finding it very difficult to look for him. suddenly i heard his voice from the drain, i stopped breathing for a while and everyone started shouting that the boy had fallen into the drain. before me or my husband could react, someone jumped inside and took my son out. i just gathered him in my arms to console him and turned back to thank the person, but he had vanished from there, could not find him anywhere and nobody from the people gathered there knew him.