At about that time, Matthos also sees that there's only one ship. So the ship that Joffrey saw is a single ship that's between Stannis's fleet and King's Landing? Davos has his own archers get ready. And they point a giant spear at the boat. Davos's archers are also told to hold. Man, I bet archers get tired of having to pull their bow and just hold it like that forever. Davos sees that there's no one on board this ship. Ahhh! Ghosts!
Back to the wall. People are shouting about having more rocks coming up. The crazy old alchemist -- looking even crazier -- brings up a torch and hands it to Tyrion. Joffrey and the Hound back up.
The empty ship floats past Davos's ship. The archers all continue to point at it. As it goes past, Davos sees that it's leaking some kind of green fluid. He recognizes it as wildfire and starts shouting at everyone to steer clear of it. There's a lot of green floating on top of the water. Tyrion throws the torch into the air.
That's the signal, apparently. Down on the ground outside the city, Bronn dips the tip of an arrow into some fire. Then he shoots. The flaming arrow flies very far through the air over a few boats and hits the green pool dead center. Davos yells for Matthos to get down. But I don't think it would help, because there's a huge green explosion that basically wrecks their entire ship. Kaboom! Davos goes flying and the boat gets reduced to splinters. Even on the wall, Joffrey can't look straight at it. The Hound doesn't flinch. The green fire appears to have taken out many, many ships. Men run around on fire on the ships that didn't outright explode. There's some regular non-green fire from where the wood of the ships touched the wildfire. Tyrion looks around to get reactions. The Hound doesn't have much of an expression, but I think he's impressed. Joffrey is delighted! As he should be, because the giant green fireball looks amazing from the castle. It's like he has the best seat for Fantasmic! ever!