"Game of Thrones" plotline is practical, but probably can't hold back the White Walkers.
Need to hold a door? Oh, "Game of Thrones" fans, we can't even say it without welling up. But it's a fact: sometimes you need to prop a door open so the kids in your second-grade classroom can all file inside. Or prop it closed, so your tabby cat's litter of newborn kittens won't get out. Or maybe to keep an entire army of White Walkers and the creepy corpses they control out of your cave. You know, normal life stuff.