The cat incident at a facility I worked at.

Its cold up here in the winter, sadly, the residual heat from even totally passive components like switch gear is enough to warm things up enough to attract them. .001% of 1MW of power is still quite warm. (I have no idea how much switchgear leaks but i know they are warm even in winter outdoors).

And, yeah, the rest of the writeup is also an amalgamation of some panic-inducing experiences in my life.