The Octopus Junction Box
The following junction box was removed from my house, having spent the best part of 30 years in the roof. Unfortunately, it was not the worst electrical issue, but was probably the most photogenic of them. In my view, this is a good example of what not to do. If nothing else, it is too easy to get messed up with what wires go where. And this did actually happen in my house!
I believe that this junction box was used on the lighting circuit, probably dealing with some two way switching.