Tyrion: Do you remember cousin Orson? Orson Lannister?
Jaime: Of course! Wet nurse dropped him on his head, left him simple.
Tyrion: Simple?! Used to sit all day in the garden crushing beetles with a rock … “Kung, kung, kung, kung …”
Jaime: Kung, kung, kung!
Tyrion: Nothing made him happier.
Jaime: Nothing made you happier. You’d think being tormented from birth would give you some affinity for the afflicted.
Tyrion On the contrary! Laughing at another person’s misery is the only thing that made me feel like everyone else.
Tyrion: So, I went to Maester Valeric’s library. Turns out, far too much has been written about great men, and not nearly enough about morons. Doesn’t seem right!
Tyrion: And as I watched, I became more and more sure of it. There was something happening there. His face was like a page of a book written in a language I didn’t understand, but he wasn’t mindless, he had his reasons.
I should have mentioned for the uninitiated that Jaime, too, is newly disabled, having had his right hand chopped off while in captivity. This is a pretty big issue for him since his main identity and "claim to fame" in the "Game Of Thrones" world was as possibly the best swordsman in Westeros. So in this scene, we have two brothers, each with a different disability, discussing a cousin who had yet a third different kind of disability. And arguably, they're not even really talking about disability. You just don't see that happening on any other TV show, or even many movies.