A guy — and let's face it, it usually is a guy — stands in his shed or garden or kitchen, and performs a simple experiment running an electrical current through a jug or jar of water.

一个人——让我们面对现实吧， 通常是一个人——站在他的棚子、花园或厨房里，做一个简单的实验， 让电流流过一壶或一罐水。