Agreed what a horror. It is something the father will live with everyday remaining of his life. That poor child gravely damaged.
Had a friend in the country who let his young son ride on the tractor while he was mowing the hay. Hit a bump boy went over backwards under the mower. No time to stop.
My wife said “I know why when you are mowing you say I don’t want anyone near me”
Very sad. Children and machinery don’t mix. Keep them away at all times.