|The flying, fickle finger of fate recently seen over Fort William.|
John - Colloquial noun for toilet, the willing client of a prostitute or an unnamed or unidentified body (dead) in the USA.
Wood - Useful construction and combustible material found inside trees. In fact trees are made of wood mostly, as far as I know. Also the collective noun for a small clump of trees.
Bar - Tavern or drinking den/shop. Also a length of iron or a handy chunk of soap, chocolate or toffee.
Clay - Useful, malleable construction material used in bricks, china and ceramics once cured or fired in a kiln. Also found in raw form somewhere not so deep in the soil or in river beds, holds water well therefore non-porous.
There you have it, the fickle finger from the hand of God points; how many other troubled four nouners are there out there?