I believe in using gravity as a tool.
There's an interesting article in the Annals of Irreproducible Research
where (using a suspect extrapolation!) they calculated how many times you'd
have to drop a frozen turkey from an 10-story building to get it fully cooked.
IIRC the title was "Cooking with Potential Energy". The text (though not
the graphs) seems to be online at
http://www.bmsc.udel.edu/niiler/HESC276/PotentialEnergy.txt
Tim.