The fourth pub on the trail is The Cross Hands, which can be a reference to two plot devices. On the one hand, its the first pub where the two separate narratives a drinking reunion and an alien invasion finally cross each other with the fight in the bathroom. A less portentous way of looking at it would be that The Cross Hands is a reference to the fighting which finally occurs in the pub, with cross hands being an obvious reference to the fact that our central characters and the teenage robots end up punching each other a lot.