Mine is when I was about four years old. My mum asked my brother, who is two years older than me, to either switch a lamp on or off. Being the competitive younger brother I made a dash for the lamp and tripped over my mum's shoes which had carelessly been left in a very hazardous place. My chin landed on the corner of the table the lamp was on. Hospital. Stitches. Lawsuit against my mum and her shoes. Haven't touched a lamp since.
