Since we are discussing unsafe footwear, I was stupid enough to quickly fetch a horse from the field for a lesson. To safe time I decided To go out in my work clothes so the student could groom while I changed. I was wearing open toed sandals when the horse went to stomp a fly but hit my foot instead.
The stud on the shoe went through my toe nail, grinding it and severing the artery. Needless to say the lesson of the day was: do not wear sandals around horses. I drove myself to the emergency wearing one rubber boot that was filling up with blood.