My favorite part of "Family Handyman" magazine is "Great Goofs" where people share their best screwups.. it is very funny, and educational. Stuff like was working on drain under the sink, had them taken off, was under there, but forgot that dishwasher was one, it drained and ran all over me... or painted myself into a corner while painting the floor... you know, the stupid stuff you only do once.. and slap your forhead with your hand when you realize you did it.
Let's hear yours.
My most unique one was; installed long string of lights around gutter and eves of my house. They started blinking... which was odd, as they were the bigger c-9 bulbs, and had no blinker installed. Finally I figured out, after a lot of head scratching, that I had put a timer device right up on the gutter next to the first light bulb. The device has an electric eye, and turns on when it gets dark, then off when it gets light. I turns out I had placed the timer right next to the first bulb and it was bright enough for the electric eye to think it was daylight and shut the lights off. Once the lights are off, it was dark enough for the string to go back on. on-off-on-off-on-off... It was hillarious once I figured it out..