English: Tree Stump, near to Langbank, Renfrewshire, Great Britain. Looking past the tree stump and silage pit over the River Clyde to the west side of Dumbarton. (Photo credit: Wikipedia)

Most people have at one point said “I’m going round in circles” but many experiments have shown that a blindfolded person, when told to walk in a straight line, will end up walking in a curve to one side.  On the edition of QI tonight Jack Dee suggested this may be some kind of self-preservation response but nobody really knows why it is.

On the same programme the example of the experiment described involved a man who set off across a field blindfolded and spiralled right in smaller circles until he fell over a tree stump.  This proves one of two things however – humans can detect minute changes in the Earth’s magnetic or gravitational fields caused by things like tree stumps and are drawn towards them, or the universe has a sense of humour.