Another machine that is so simple that it is easy to overlook is the wedge. The idea of a wedge is that due to the angled shape, as it is pushed forward, force is exerted outward (at right angles to the path of the wedge. Think, for instance, of a log splitter - you put the log splitter in the top of the log and hit downward with a sledgehammer. You are exerting force downward on top of the log splitter, but the result pushes the two halves of the log outward. Or even just an axe is a simple example of a wedge, with really the same idea. Axe by Demonhunter.
You killed Kenny! You b... by dm_meister