Darwin Award Competition
"Sure, you can play with Dad's gun - if you'll just eat your soup!." That's more or less what a mother in Portugal told her four-year-old son. Being four, however, (and regrettably ignorant of such things as safeties and proper gun-handling) he not-surprisingly shot her in the stomach.
I don't think anyone could have seen this accident coming. Only now, after the fact, does it seem obvious that giving preschoolers loaded weapons is a bad idea - at least until they've been properly trained.