energy
Puns about energy.
BatteriesGravity batteries have interesting potential.Up hillI tried to go up hill but fell back down. The potential was there but it went down hill.Solar EnergyI imagine using the sun for solar energy is a bright idea. I can't see it happening though.Wind PowerWhen it comes to wind power I'm a big fan.PotentialThat guy had a lot of potential until I dropped him .