Bob the Builder.

Today I worked in my mother-in-laws apartment again. This time I took upon myself to hang a shelf in the bathroom. Just imagine yours truly working with an electric drill, slowly and patiently going deeper and deeper into a wall, when ... *splosh* a fountain of water comes out! In the movies they usually strike oil this way, but in my case it was just hot water coming out of a plastic pipe inside the wall. I tried to stop it with the palm of my hand, but it was waaay too strong to handle. Someone had to run into the hallway and shut off the main. The end result - a ruined pipe, water cut off for the whole apartment, wall needs to be partially taken apart and rebuilt. An afternoon well spent.