Several things with duct tape and wiring but I really don't remember much about them except failure ;P But one thing that was a success, when I went to take the driving test for my drivers license, the fuse must have blown on the headlights just before I went in because they weren't working (though they had that morning on the drive there) and they won't let you take the test if your car isn't perfect. But! A perfect MacGyver-ism sprung to mind: a gum wrapper (the kind that used to have a shiny side and a white side like in Wrigley's) wrapped around the fuse will make it work again. And it did just long enough to take and pass the test. I was rather proud. :D