Question (Potential Spoilers in the Answer)

I've only seen part of this show and have been meaning to watch it all, but I was just curious - someone on another site mentioning this show having the darkest moment he had ever seen in a comedy, but didn't say what it was. Does anyone have any idea what it could be? As a big fan of dark comedy, it certainly piqued my interest...

What's going on? What's all this shouting? We'll have no trouble here...