500 years ago, Martin Luther posted his 95 Theses on the Power and Efficacy of Indulgences on the door of of the Wittenberg Cathedral. A sort of "ding dong ditch". Other previous reformers had been burned at the stake so it probably wasn't a good idea to stick (get it) around.
1 Chemical Reaction Demonstration: Pumpkin Pop
2 Test CH4.1 and 4.2
This is a video of our early practice.