There's nothing we love more than a good blooper reel. So seeing the very serious people in Westeros fluff their lines, break into dancing and pull gooner-faces is just fantastic.
Also, we have a very hard time reconciling Tywin Lannister saying the word 'fuck' and breaking into a big smile. We feel like he's about to order his guards to seize us and throw us in the dungeons or something.
And because we're extra nice, here's a .gif you can take with you of Oberyn Martell almost getting set on fire.