Shockers

Builders, not paying attention, screwed the floorboard down straight through this cable.

The basic insulation on cables degrades over time.  When we took this faceplate off the basic insulation fell off and landed in the bottom of the back box

All accessories should be sited so they are easy to maintain if required.  This person couldn't possible reach another two inches to the other wall to turn their light switch on

Holes above luminers should be sized to prevent the spread of fire.  When we told this landlord he couldn't be bothered to make the repair.

A PAT test may have prevented this near fire

If you still have an old style fuse board and the 30 amp fuse blows get a new fuse.  Don't wrap two lengths of 15 amp fuse wire round it and hope for the best.

Removing the sheathing and the basic insulation can be lethal, particularly when its live.  If you want to save a few pounds and steal the electric is it really worth the risk?

If you remove your light switch you should replace it with something similar and not wrap the live cables in a rubber glove.

Consumer units shouldn't have holes in them that you can put your finger in, its immediately dangerous.

Loose connection inside an electric shower.  See how the red cable turns black and the connection block is discoloured.  It's been arcing for some time.