Someone over on the WindowsMovie Maker.NET forums wanted an Earthquake effect.

Link - Earth Quake Effect ?

jeb314 replied with a little XML snipped to create a custom effect based upon the Age filter. He modified the parameters to turn the Age value down to 0 and the FilmJerkiness up at 255. I thought this was a cool and very simple way of using one of the existing effects in a way it wasn’t originally intended.
Very cool.