How to Set up a flour dropping prank with a light switch

This prank is about as simple as it gets. All you need is some kind of tray, some flour, string, and a part of your house where there is a pull-chord light switch (most likely the basement). Just remove the light switch chord and dangle your new string in its place, attached to your container of flour above. When your victim tries to turn on the light, bam! They'll be hit with the flour.