Oh, the trebuchet scene! I think that started out as a silly little idea I had during a late night dev session and then decided to actually implement the next morning. It elegantly solved the problem of how to start the castle scene, and is kind of awesome if over the top. I think it's one of the things that pushed me toward first-person gameplay- I thought the transition and flying through the air would work really well from that perspective. It's one of the sillier moments in the game but also one of my favourites.
I haven't actually seen the Netflix series. I've heard it's good but I've been trying to get through Game of Thrones first.