another good one (Score 1)

Here's a good one. Take two gears, a foot of wire and some pvc pipe and affix them together so that all the energy from one gear transfers to the other, and vice versa. If you do it just right, you should have a crude but basically safe perpetual motion machine. Make sure to do it outdoors, preferably on a bed of gravel, so that the heat you generate does not cause a fire. You can use the surplus energy to run your computer lab and any other miscellaneous power needs for the next week or so, until the machine is consumed in a flash of excess heat. My girlfriend used it to reverse her polarity. However, the implementation can be kind of difficult. Warning: do not attempt in an atmosphere of pure hydrogen. Do not attempt with radioactive building materials. Do not, under any circumstances, attempt with midgets.