Jon Snow owes everything to Lady Lyanna

There will be spoilers below for Game of Thrones, Season 6, episode nine. Please bear with us. 
Jon Snow came out victorious in tonight's Game of Thrones episode, and it went pretty much the way everyone hoped. But, he probably owes his life to the show's newest breakout star.
After Wun Wun the giant heroically burst through the doors of Winterfell, allowing the remnants of Jon Snow's army to swarm in, Ramsay Bolton finally agrees to a one-on-one bastard battle. This was after he stru