"How will drop into

Introduce according to small area a public security, he hears while turning on duty to patrol someone cry for help and wait he to rush through past discover, an old man cries for help in the well, he and the surrounding neighbor pulled an old man to come up together.The old man returned into well to explore a body while just coming up, the side explored to nearby say:"Kid, the kid is still in the underneath."After being public to hear, immediately try to save a kid again, but from above have already could not seen the kid is shadow, hence everyone immediately notifies 999 first-aid personnels and the kid is father.
"How will drop into?The well covers to all cover thoroughly at ordinary times, how can open, this kid so dropped into."Cover to the well why open, the surroundings neighbors all mean it is very interrogative.