本富兰克林和其他的人帮助证明了这些闪电式电荷交换的产物，但是，什么使电有这么大的威力？
Ben Franklin and others helped prove that such lightning was discharged electricity, but what generates that electricity in such prodigious quantities?
来自云端的闪电有可能是正闪电，很少见，但可能比更常见的负闪电的威力更大。
Lightning that comes from the top of the cloud can be positive lightning, which is rare but can be significantly more powerful than more common negative lightning.
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