Normally the Mayfly hatch excites anglers, since fish feed on the insects and their abundance often leads to fantastic fishing action. However, when a hatch turns into a horde, something is crazily wrong. Imagine so many bugs that they show up on radar?

That’s what happened on the Minnesota-Wisconsin border, when a summer mayfly hatch overwhelmed the region and was the suspected cause of a three-car crash that resulted in the hospitalization of one driver.

Watch the video that one local uploaded to YouTube.

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