I still have a scar on the inside of my left ankle. Sometime, when I was in High School, I received a HeathKit, for an AM Shortwave receiver. It actually turned out pretty nice and I used it for years.
While building it, I was wearing a pair of hiking boots that were not laced up. A ball of solder feel off the iron and it landed on the inside of my boot. Did you know you can not remove molten solder from inside your shoe until it has cooled enough to become solid again?