In the heat of combat, you swiftly raise your knee into your foe's testicles with a sickening sqelch. He reels back, grimacing in pain. A sheet of red crosses over his face. At first you think it's just a lack of oxygen as he struggles to breathe (it's that, too), but you quickly recognize it for rage. Once the simian's breath returns to him, it returns with an ear-piercing shriek and huge ivory fangs.
"Uh...sorry?" you stammer. It's too late. Not even an act of God could stop what you've unleashed. He rushes at you with newfound anger and strength, ending the fight in a shower of gore before you can begin to counter.