The pier story is . Feel for all involved as it was an accident.
Accidents can happen to adults too.
A woman here in Australia was jogging along the river with her very young baby in a pram. Her mobile rang and she answered it turning away from the pram and walked a few steps. 5 min coversation and when she turned back around the pram was gone. She screamed and started searching thinking someone had taken the baby. In fact the pram had rolled backwards into the river with baby still strapped in. It was over an hour of people/police searching the area before they found it. Absolutely tragic.