Shock John Travoltage. What else can I say?

[list=1][*]What happens to the excess charge that John Travoltage has acquired? Why does it do that?[/*][*]How does the position of his hand change the amount of charge needed for a spark? Why?[/*][*]What's the longest spark you can make?[/*][/list][br]Credits:[br]PhET Interactive Simulations[br]University of Colorado Boulder[br]https://phet.colorado.edu