i noticed yesterday that there is a trend for very thin high heels. i noticed this when someone nearly got stuck on an escalator and someone else did get stuck going in to an office building in a little great (great little?).

it got me thinking back to physics lessons at school and how pressure is related to weight and area. a quick google search revealed a number of essays on this subject. one such is here:
Pressure Under High Heels.

Bear in mind that as high heels become smaller, the pressure exerted will tend to infinity. and that's a lot of pressure.