joy in harm

Schadenfreude:

But among men, at least, that empathy disappears if they see someone else behaving selfishly. Then, they may even feel good if the other person receives physical pain."

I've felt a twinge of pleasure, a curl of my lips upward, and my eyes squinting with a glint of wildness, when someone I dislike, whether for cutting in line or harassing me, gets rebuked. I curl my mustache and say, "Yes, life's fair when it is so." Our darker nature indeed, Iago.