Geoff Williams of Birmingham emailed us with this, well, rather odd account of what he gets up to when he's in the car...

"When driving, I lift up my big toes to avoid objects as I pass them. I don't know when it started, sometime in my early twenties I think, but it has evolved as time goes by. At first it was just road junctions; I was happy with toes planted firmly against the sole of my shoes until the side road was dead level with the car, but then unaccountably had to lift them until solid kerbing resumed. This later developed to include driveways, drains, lamp posts, roadside furniture, cat's eyes and eventually other road traffic, whether parked or mobile. Depending on their relative speed, cars normally only warrant a single lift, buses require one lift for each axle and lorries one lift for the cab, another for the trailer.

To make it more complicated my feet now operate independently, left toe lifted for objects passing on the left, right toe for those on the right, both for a pedestrian crossing. Changing gear and braking obviously add to the difficulty of this exercise, but it proceeds nonetheless. The object of all this is a mystery to me, but the feeling of well being increases with the degree of difficulty and precision of lift."