So you've been in a long and tedious battle with That One Boss, and it finally looks like things are going your way and that you have the upper hand. You breathe a sigh of relief: you think you've gotten the boss's pattern down pat, you've learned how to effectively deal damage to it and dodge all of its attacks at the same time. A wave of relief washes over you as you finally get its health meter down to half -- now, you just have to do it all over again once more, and you're the winner. You got this, man! You got this by the ass! This trope now comes with an exact audio-visual example: