Many, many years ago I found this mousetrap in an old house, an old house not dissimilar to Maggie, Tom and Mick's house.

It is the most extraordinary device and, in my view, it took an equally extraordinary mind to decide to engineer such a complex piece of equipment for the relatively simple task of killing mice.

Let me try to describe how it functions.

To start, there is a grater on the very top of the contraption.

This to enable the person setting the trap to grate cheese into the cavity below

The next task is to raise the portcullis door at the front which allows the floor within to pivot forward and hold the door up.

The misfortunate mouse, having smelled the cheese that has been grated into the cavity above, enters through the open door and walks onto the floor within, which now pivots back allowing the portcullis door to descend and trap the mouse inside.
Our mouse, still attracted by the smell of the cheese, climbs upwards through the mesh tunnel.

Half way up there is a barrier that the mouse is able to push though but which falls back into place once he has passed by, preventing him from turning back.

At the top of the mesh tunnel he enters the cavity into which the cheese has been grated. He drops down to eat the cheese only to discover that the floor of the cavity is a trap door over a tank of water into which he falls and drowns!

But the trap inventor's ingenuity has not run out yet.

The the trap door floor of the cavity is connected to the portcullis so that the action of the mouse falling through it, raises the door and re-sets the trap.

Some trap, some mind eh?