Drilling the holes in the metal beams...

... to allow for pipes and cables to go through the floor structure up to where they need to be. Satellite (Sky), network, electricity, central heating, etc.
For those of you who like tools (Pierre + Chris that's you guys :-)  ), this is a nice drill with a big electromagnet which sticks this heavy machine (prob 10kg) to the metal beams to be drilled. Switch one button to "ON" the electromagnet gets powered and the drill litterally sticks to the beam. Another ON/OFF switch turns the drill on and off.
Obviously there is DANGER: if you turn the magnet ON, and then the drill ON, you're OK, but things can go fishy when turning things off:  you need to turn the drill off BEFORE you disable the magnet otherwise you'll have a 10kg spinning drill trying to obey gravity and crash on the floor below... Same story (Even worse) if you turn off the magnet by mistake thinkin you're only stopping the rotation of the drill... Better not be anything below if this happens...

Model: Evolution ME3500 magnetic drill

NAIIICE !  (c) borat