Three instances come to mind for me;
1) A gg Aunt's niece who drowned in the late 1800's. She was 12, and was collecting shells, when she fell into the water, and the weight of the shells she had gathered in her dressed kept her under water.
2) My g grandfather's son broke his neck diving into Botany Bay, and drowned. The gg grandfather later remarried and 2 of his others sons, aged 6 and 13 both drowned in Botany Bay the same day in 1922.
3) Same g grandfather (bad run of luck!). Another son 18 old, tried to enlist in WW1 in 1915, but was rejected. He tried again when 19, and was accepted. After training sailed to England then to France. Only 2 weeks after joining his unit at The Front, he was "wounded with gun shot wounds to abdomen, shoulder and thigh. He was operated on immediately but owing to the severe internal injuries he did not recover".
No doubt I will find some others to pst as well.
Les