Here’s a life-coaching session in five words: Never watch a weasel dance. 

Metaphorically speaking, that is.

You see, when weasels go hunting, they locate their favorite prey—rabbits—and then, right out in the open, perform a bizarre murder dance. They flail, they leap, they spin and somersault so frenziedly they make Olympic gymnasts look kind of sluggish.

This fascinates the rabbits, who stop and stare at the dancing weasel. They’re so amazed that they just sit there, unmoving, as the weasel j...