not quite walking on the cracks
I mentally draw diagonal lines from the corners of paving stones, and try not to walk on them. Or sometimes I try to walk exactly on the midpoint of the lines. Or if the paving stones are rectangular I work out how many of them form a rough square, divide that into diagonal lines and try to walk on them. Or not on them. Or in multiples of stones. Or some other random combination of diagonals, angles and lines.

I do this with tables as well - placing a glass just so that a diagonal line bouncing off the side of the table forms a perfect tangent with two sides of the glass. Or placing it at some other imagined cross point of two, four, eight 45-degree diagonal lines or 30-degree ones or other ones that make up a multiple of the table length or something. I sometimes move other people's pints if they're not placed quite right.

There must be a suitable pun to describe this?
(cypherspace is not a toaster, Sun 4 Jul 2010, 20:09, 2 replies)

I do this a lot
The exact same thing. I have tried to explain it to my girlfriend, but she just looks at me like i'm mental...
(Scrumpy does not negotiate with terrorists,, Sun 4 Jul 2010, 21:22, closed)

Psychogeometrics, perhaps?
With the emphasis on "psycho".
(Pie of Meat ___°¬¯O¯____\o/_____/\_,____Y¯¯Y, Mon 5 Jul 2010, 0:32, closed)