My partner and I responded to a "no power to half the house" call from a property management firm.
We were greeted there by "Chong," who described the problem. Looking at the fuse box, the first thig we see is a good 30 amp fuse, carefully wrapped in aluminum foil. After removing this, checking the circuit with a meter, and installing the correct fuse, we went into the house.

Still no lights. Hmmm. As I approached the first fixture to look for clues, the roomate "Cheech" came down from the second floor.
"Hey, Man... I forgot to tell you I took the bulb, I needed it upstairs."

Let's see... light doesn't work... the first thing you do is get out the foil?