1970s, uk, aged around 4 or 5, walking down the stairs carrying a glass when I tripped, Cut my right hand up pretty bad. My mum wrapped my hand in a towel and rushed me to a nearby army base where the medic did an effective but clumsy job of stitching me up - I still have a big scar but no movement damage.
I have no memory of it, but my father certainly does. When he came home from work to find the house with its doors wide open, blood everywhere, and nobody around, he kind of freaked out.