There was an amazing story on the BBC Website yesterday about a Chinese teenager walking down the street.
The pavement fell away beneath her and she plunged out of sight, initially being knocked unconscious.
A cab driver saw what happened, stopped his car, and went down into the hole to comfort her, and stay with her till rescue teams got them out. It is believed the hole was caused by subsidence due to underground water erosion.
What an awful experience for the girl – and what a great guy!