Oh my gosh! A nightmare of every parent!
My friend's toddler fell out of the crib onto a hard floor - I still remember her terror/angst/tears
Thankfully the child was okay - none f the signs of a concussion
There is another aspect too to be worried about - there was a story how an iron box accidentally fell on a child leaving a bruise and the school called the authorities - the child was taken away and there were a whole lot of legalities after that - so here, any little things can get reported either by the school or neighbors or whatever