So, all those guys should be pretty pissed at the Hound for his stupid rock throwing stunt, right? But I guess the writers couldn't think of any other plot devise to get the zombies to stop just long enough for Gendry to run back to Eastwatch, a raven to fly to Dragonstone, and then for Dany to (almost) get back to the North...and then the zombies suddenly start their attack again.