[GregBuchholz]

We can even do better than that and harvest the potential energy stored, rather than simply dissipating it as heat and motion. How to do this is left as an exercise to the reader.

[mindcrime]

> How to do this is left as an exercise to the reader.

For some reason I am picturing this cartoon:

http://star.psy.ohio-state.edu/coglab/Pictures/miracle.gif