Occasionally -- generally after partaking too liberally of caffeinated beverages -- I find my cranium invaded by thoughts which would seem more at home inside Colin's head.
For instance, what part of a rat is the zinger? Is it the same as the dinger? And what are the similarities between a rat and a schroe?
(The Head wouldn't have provided the explanatory links there, of course. I should be more disciplined about leaving these things as an exercise for the head-reader.)
Sadly, the River Exe and the River Wye turn out not to be at right angles to one another at all.