http://www.carswithcords.com/nissan-leaf-recharged-volcano/

Here’s a neat article about a Nissan Leaf owner in Hawaii that used up most of his car’s battery climbing the long winding road up a dormant volcano mountain then had a full battery again when he got back down.  Thanks to the regenerative braking that all electric cars, plug in hybrids, and regular hybrids have he was able to recharge the battery coming back down the mountain.  This is something you can only do with electric cars!