I haven't done it yet, thankfully! However last month I was doing a re-wire at a property for a guy who'd just bought the house. The whole installation was a nightmare as the previous guy had done a lot of additional wiring himself, and didn't believe in running earth wires.
Anyway, I had taken all the floorboards up to put in some new downlighters in the kitchen ceiling. Went home with the floorboards still up, and came back the next day to find the previous owner had broken in whilst under the influence, gone upstairs to where his bed used to be and then fell through the ceiling, ripping out all my wiring!
Found him asleep in the dining room the next morning, not injured just really hung over.
