Kelvin water dropper

[jucole]

Hi,  if you haven't seen this before it's pretty cool.

A brief wiki explanation
http://en.wikipedia.org/wiki/Kelvin_water_dropper

Prof. Walter Lewin giving a demonstration.
http://ocw.mit.edu/high-school/physics/demonstrations-on-video/conductors-capacitors-dielectrics/demonstration-kelvin-water-dropper-revisited/