*Spoilers only if you are not up to date on season four.*
One of the most unexpected and awesome moments of the season four finale came when Stannis and his army came out of nowhere and attacked the Wildling camp. We have nowt against these Wildling folk, but it wasn't looking good for Jon Snow ahead of this invasion in fairness. We also loved it because it led to this meme...
While those that followed the show closely (and of course read the books) may have seen this coming, many didn't know just why and how this could have happened. Well, author George RR Martin took a minute to explain how it all came about, and what exactly had Stannis north of the Wall in the first place.
"He's been trying to become King to save the realm, when he should have been saving the realm to become King."