So, not a fanfic, but the novel Bunny Girl Evolution (Volume 1) has the following exchange as part of a sequence lampooning a large number of fantasy tropes (and the elves vs dwarves thing in particular):
Quote:"Your Majesty, I’ve changed my mind," said Elise. "I believe it’s best we save this conversation for another time."
"More bad news then?"
"Not news, persay. Just some thoughts I had."
The king glowered at her. "And you think these thoughts would worsen my mood."
"Not necessarily, but-"
"But what? Out with it already!"
"I think it’s something best discussed when we’re all a bit more rational."
"You think I’m irrational right now?"
Contrary to how he had been speaking before, shouting and spewing curses, his voice turned quiet, and his expression was blank. The tension in the room reached its peak as he stared at her and Elise worked up the nerve to say what she knew she had to.
"Yes, Your Majesty," she said finally. "I think you are irrational right now."
He stared at her for a few moments more, then jumped to his feet.
"Dammit, you’re right. I need to go hit something. Nobody leave!"